The Mickeys they run are the DOT approved street legal drags (ET streets). DrDcanaceu (Dean) who just recently dyno'd 700 or 800 someodd hp is also running the Mickey drag radials last I saw. The tires Im gonna go with soon are the Toyo R888's which are more of a sticky track tire with better sidewall than Mickeys. Hopefully they last longer too.
But I do agree that having a wider contact patch is better for traction just not completely neccessary. The other downfall to goin with bigger wheels and tires is the added weight.