Its interesting you should say that. My quads stay tight, I swear. I think I may have to start to do the foam roll. I am curious how much this may be contributing to soreness in my knees.
I read in a mens fitness journal that if you try a squat (no wts) with your arms raised above your head that you should be able to keep a straight posture. If not then there are several reasons why you cannot. If you lean forward, then that is the tight glutes and quads. There is more to the assessment that I cannot remember off hand.