I was one of those; my 50% was an exaggeration, but I had him at something like 58% in Big East play (I didn't have that 6-6 from the Florida and Stanford games, and I missed another of the opportunities that you used).
For the record, I'm a Syracuse fan, I like Brandon Triche as a player, and I'll readily acknowledge that he's our best free throw shooter. I jumped into the fray yesterday because someone (Mark, maybe?) said Triche only hit half his late-game free throws and that guy who makes all the idiotic posts tried to contradict (as always) without any supporting statistics. He's irritated many of us in the past because he's argumentative and makes ridiculous claims, so I quickly scanned Brandon's Big East game logs on ESPN and made a post in support of what Mark said.
As you noted, Brandon's got too few late-game free throws to claim with certainty that he's got some kind of problem. However, his late-game numbers are significantly worse than his overall numbers. I wouldn't call him (or anyone else on this team) a clutch free-throw shooter.