I suspect a lot of the 'posing' in uniforms is associated with pick-up games - the recruit gets to the locker room and there is 'practice' gear laid out for them. At Uconn it is probably just the standard practice gear, at other schools it is an actual uniform. And the pictures are not 'photo shoots' they are 'casual' events - hey lets do a picture.
I still find it a little much - like the things TN used to do with the name on the uniform and on the locker, and the video presentation on the scoreboard screen.