This thread was primarily about what Boo did / does with the jumps and multi-eventers. They typically squat much deeper (below parallel) and do very wide split squats.
Dennis who coaches the sprinters (including X) doesn't squat as deep (at least not for the majority of the year) and while the lifting frequency and volume is about the same as the jumps / multi-eventers, there seems to be less emphasis on the intensity.