he's not huge on benching, maybe it's just one of those things he didn't really feel like trying out.
of course, the alternate possibility is that, since his videos indicate he doesn't train from chest to lockout, really going all out on fuller reps isn't really up his alley. sorta like if you took an APF lifter (even if he lifted raw) and then put him in a competition where he had to go ass to grass.