Here is a video of Cristi Bartlett squatting. She did 6x6 on the squats, staying with 285 for her last 3 sets of 6. She has come a long way with her squats- she used to push off of her heels and drive with her head and chest instead of staying with the "lean".
Also interesting that because of some shoulder issues, she basically "high bars" all of her squats. I like her speed and the fact that she doesn't give up on reps. She has worked at it. Her 1 rep max is around 365, and I forsee 405 in the not to distant future.