Just watched the fight as well. Good fight, decent action. Couple of points (and you know, hindsight is always 20/20, so its much easier to say all of this after the fact)
1) Even leading up to the fight, I felt like Lemieux was being rushed a bit. Yes, he had a notable amateur career. But this guy is 22 years old. There's a reason there aren't many 22 year old champions. Because they dont have the mental maturity or experience level. So I feel Lemieux was rushed into this fight, and should have had say 1.5 years more experience, or 3 to 4 fights.
2) Even though he lost, Lemieux still showed excellent punching power, and heart. No question this guy is talented. Its just a matter of realizing that talent, getting him the right fights.
3) This is not a bad loss. Lemieux was not knocked out cold. I applaud Lemieux's trainer Russ Anber for stopping the fight, as Lemieux was dropped and taking punches. It was the correct time to stop the fight. Had the fight not been stopped, its very likely Lemieux would have been dropped again, and perhaps KO'd out cold or unconcious.
So its not a bad loss. It could have been worse. Lemieux is very young, obviously has talent. Its just a matter of him realizing that talent. He needs 5-6 comeback fights, perhaps even more. And he needs to go some rounds.
Then when he's 25/26/27, he'll be in a better position to challenge at this level.