I am not an expert, by any means.
But I took glutamine all day yesterday, even sipping glut/creatine with gatorade during my workout. I beat the shit out of legs for 75 minutes and thought I'd be limping today. I'm not. Very weird lack of DOMS.
I must have done a total of 7 sets of standard then front squats, followed by 4 sets of barbell lunges. Then leg press. Then lots of leg curls, glute machine, heavy ass calf raises...
Maybe the glutamine did it, then?