I have no problem with this team's half-court defense for the most part, it's one of BF's best ever. But I don't think he has the athletes and depth to press fullcourt unless an end-of-game situation calls for it.
I don't think athleticism is the determining factor; perhaps depth is. I do think it's more of a coach's philosophy.
Example: Green Bay used a 3/4 court, zone press against both Virginia and ISU in the NCAA's last year, yet both UVa and ISU had more athletes than they did. UWGB beat Virgina and really should have beat us.
South Dakota State full-court pressed Baylor two years ago in the NCAA's, and barely lost the game, 60-58. I doubt SDSU had an "athlete" who could even play for Baylor, much less start for them.