I skid. A lot. Too much. So when I say that a freaking LOVE Continental's Gator Hardshells, know that they've stood up to a LOT of abuse.
I've used a fair number or tires at this point, skidding through probably a half dozen nameless racing tires and a few fixed faves (fyxations, armadillos and randos), and none have held up as well as my Gators. After about two months of everyday use, I STILL don't have any skid patches! That's close to 800 miles of use, including polo, where I skid even MORE than usual. I think I've FINALLY found a tire I like!
While this tire does have many other features that I haven't really expounded on - flat resistance, good grip, not too heavy, long term endurance - I'll leave it to other reviewers. For my purposes, this tire is among the best I've ever used in the 700c set. Right now I'm using the 700x25, but it also comes in 23, 28, or an extremely elusive 32 (according to the website).