1.4 BPG in only 21 minutes/game does make Turiaf one of the leagues best shot blockers. 1.4 BPG is good enough for 20th in the league overall irregardless of minutes. And his 3.2 blocks per 48 minutes ranks 9th in the NBA. So yeah...in the same way I'd call Danny Granger one of the best scorers in the league (9th), I'd also call Turiaf one of the leagues best shot blockers.
It doesn't matter... that point really wasn't even relevant. The fact that he blew the layup despite "one of the best shot blockers in the league" being there is futile... he was point blank.. he scored 42 points, I bet he had a tougher lay up during the game. He choked. If you cannot acknowledge that he choked, you're just giving the benefit of excuses.