Use of pace when using a ball screen is an underutilized, under-taught fundamental skill for any guard. Certainly, change of pace - particularly going from slow to fast - is important, but going at your own speed once either contact is established or an advantage is gained is similarly important. Once the handler has the defender on his hip, he can slow the game down with a veer or maintaining contact, then he can make the correct read.
The first clip in the video is Jeff Teague of Wake Forest from 2007. Teague attacks the flat screen, but notice not only his change of direction, but his change of pace. This keeps the defender from forcing the ball to one side of the flat screen or the other. (On a side note, I think the flat screen is underused. Notice Wake’s space - the other three offensive players are flat along the baseline, making the defense help up if they are going to help, thus putting them in a vulnerable state) Teague veers, putting the defender on his back and gets an open look.
The next clip is of Phil Pressey of Missouri from last season’s game against Old Dominion. Pressey is so good at changing pace and keeping the defender off guard, gaining an advantage, then playing at his own speed from there. He extends past the screen a couple of dribbles stretching the defense, then finds the open baseline cutter.
The third clip is Pressey again. Again, he goes from slow to fast, gains an advantage, forces contact, and gets the foul called.
The final clip is of Kent Bazemore of ODU - an all league selection. He too plays at his own pace, going from slow to fast. He recognizes a mismatch - being 6’7” - and knocks down the jumper.