I must say, I've trained for over 20 years (sometimes on and off). I've squated 455 pounds (not great I know), had 25 set leg days, done widowmakers, heavy deadlifts but I've can say I've never puked directly from a workout.
Lately, with articles I've read, we're made to feel if leg day doesn't make you call the dinosaur, then you haven't placed enough intensity into it. I'm certainly not obseesed with the idea, nor am I fond of the thought of tossing my cookies in the power rack after 20 rep squats. Does anyone regularly do this??