Well I go make study, taking reference last final 100m in Berlin:
-For get final, the slowest was Chambers 10.04
We can imagine that this year will be almost same, Lemaitre should make about 10.00 in semi final for get final.
-The places in the final were:
Bolt 9.58(i dont think that repeat same time or near, but about 9.7 is very possible)
Gay 9.71(very fast in that race, probably his best race, but now he is injuried, out)
Powell 9.84(perhaps he is 2nd favourite now but usually in big finals he always down level, so if Lemaitre is near , in the last 40m if Powell has crisis can to be defeated)
Bailey 9.93(good 4th place, i imagine that he could make more or less same time)
Thompson 9.93(5th place, was 2nd in Beijing, good runner perhaps he can to be around this time)
Chambers 10.00(good 6th place, i see him perhaps in this time but i think that perhaps he dont get final because he is a little worst that in 2009 and the semi finals will be very fast)
Of course we can add now runners like Dix,Rodgers,Blake and Mullings but Gay OUT.
We can see that usually in big finals , people is not super very fast by nerves or lack experience(only Bolt and Gay perhaps never fall).
If Lemaitre make 10.00 or little better in semi finals and around 9.90 in final, 4th or 5th place easily.
Yes, is very hard, but i think that Lemaitre is more fighter that most runners and we are looking that most runners are running around 9.90-10.00(very few distance really).His final part is amazing and although he is a little slow at beginning, he can defeat to several runners in the last metres.
I hope good luck to Lemaitre, and very good race now in Lausanne with probably Powell and in Paris with Bolt and Blake(interesting duel with Blake too for Daegu)
Regards to everybody