I've lifted with tall b-ball player before, and have seen that it takes alot longer for them to show the size, especially in pics which to not put them in proportune. I'm 5'5" and to match the effect 10lbs of muscle has on my appearance they have to add 20lbs. These guys stuck with it though and after a few years had pretty impressive builds. I think the 275lb bench is completely believable....guy I know who is 6'9" was repping that when he had very little chest devel. like dankduke his tris did grow though. he seemed to benifit more from dumbell type pressing, even though the weight was not that impressive.