Disagree. Light jogging, for me, is the best way to get the lactic acid through my system.
Although, I typically advise against treadmill running anyway. So freaking boring.
Light jogging. Not "interval training". When I hear "interval training" I think heavy on, light, heavy on. Also, most people don't go for a "light jog" on a treadmill. They go for their full blown cardio workout.
Also, I am speaking directly to heavy cardio after a leg day or with leg soreness.