Zellgaddis's initial comment led me to this interview that the website SpeedEndurance did with Vazel.  I think you'll all find it VERY interesting.  The quote is long but please read all of it:
Q2 – SpeedEndurance.com:  In France weight training is often  not maximal, yet one of the best experts (Cometti) is a big influence.  Could you share how the culture of France and athletics is helpful and  harmful for strength development?
 PJ Vazel:  It is a difficult question as I have never felt there was such thing as a “French school†for sprinting, unlike Pole Vault or 
Triple Jump.  In France, strength training has always been seen as suspicion.  Traditionally, its practice has been associated with drug use and has  been opposed to “technical training†(analytical training) which would  belong to higher coaching competence.
 In a nutshell, the reasons can be understood in both historical and  geographical context. During the XIX century in Eastern Europe, the  delay in the economical development increased the necessity of  militarization within a nationalization perspective, which impacted the  education system and sport practice. Pure strength was seen as a virtue,  whereas in France, it was seen as one of the least important skill in  physical activities, as French authors considered physical education as  an aid to intellectual development. Hence they favoured agility and  coordination over strength. During the XX century, the lack of  theoretical education for coaches on strength training, reinforced by  the language barrier, coupled with some good results – yet rare – by  French sprinters who didn’t use much of strength training – if not at  all – widened the gap between France and Eastern Europe or USA on  strength consideration.
 Now, you mention Cometti. He was one whose writings were popular in  universities and well known by coaches for that he provided translations  and vulgarization of research in the field of strength training theory  (concentric, static, eccentric, etc). Moreover he proposed training  programs for strength development, which were in extenso integrated by a  few French sprint groups into their training plan. This reductionist  approach, which doesn’t take in account the interplays and conflicts  between the various training means, leads to overload syndromes in  sprinters resulting in high rate of injuries. The other problem lies in  the erroneous analyze of the sprinting activity. For the proponents of  this method, the equation of sprint training can be sump up this way:  more strength training = stronger athletes = faster athletes. If force  production is the key cause of locomotor speed, from a biomechanical  point of view, its link with muscle strength (as developed in the weight  room) is complex. kinematic and dynamic analyses show that for the best  sprinters running at top speed, the flight time exceeds 60 % of the  step cycle and that during the reduced contact time, higher ground  forces are generated.  I analyze this paradoxal muscular activity during  sprinting as a cyclic alternation of noise and silence, composing a  unique rhythm, a unique music. Inter-individual and intra-individual  comparisons using tensiomyometer show that the fastest sprint  performances are achieved with faster rate of more intense muscle  contractions as well as muscle relaxations. Also, injury rate is  correlated with a lesser quality and quantity of relaxation.  Excessive  training loads in the weight room, especially during the eccentric cycle  promoted by Cometti, result in tightness and soreness in the muscular  system. While these effects are described by the author, they are  ignored by the coaches who still ask the sprinters produce high  intensity sprint performances at training while the muscle tone status  is not appropriate. Muscle tone really is the condition for fast  sprinting performance and guarantees physical integrity. All the  training activities should be organized around this consideration.  (Note: see 
Dan’s interview for other insights)
 It promotes the theory that sprinters need to learn how to relax,  more than to learn how to contract. On that matter, scientific research  backs up the coaching cues you can read on manuals published in USA one  century ago!
 

Photo Credits: Gustau Nacarino, Reuters
 
Q3 – SpeedEndurance.com: Christophe Lemaitre is a BIG name in  France. Could you share his development not being typical of the  average elite? The JB Morin study of Christophe is touted as a landmark  study while others cite Milan Coh has better data. What are your  feelings about the development of Lemaitre and and the research of  elites in general?
 PJ Vazel:  I’m not coaching Christophe but I’ve been  observing his development for years. An interesting feature is that he  is a pure sprint specialist. At age 16, during the same meet, he ran  10.77 at 100m but only long jumped 5,51 m and high jump 1,62 m. For a  fast and tall guy, such performance discrepancies in power-speed events  leave you wonder about how complex is the notion of talent and its  detection. The most remarkable in this guy is that no matter the level  of the competition, he manages to keep his composure and respect his own  race musical partition.