Isn't being a nerd fucking awesome?
Most of the studies agree that DOMS is greatly reduced or completely eliminated with compression clothing. DOMS is not neciseerily a marker for a decrease in performance but it sure does make it easier to go workout when you don't feel like shit. I would love to see a study about whether or not they help maintain mobility that has been worked on for an extanded period of time. Thats the biggest improvement I have noticed.