Yes, a very little bit. I talked at length with Sandy (Pro6) about this, and the cost of slicks vs DOTs wasn't worth the extra life you MIGHT see from slicks.
Interesting. Maybe my next set will be DOTs then. What do you think about DOTs on a damp track? I would never even go out on a damp track on slicks, and since I can't afford a second set of rims + rain tires at the moment, I worry that this might result in some DNSs for me this year. If I had DOTs on, would damp conditions (not "wet") be doable?