I'm just about to turn over 5000 miles, I haven't gotten around to depth checking mine yet but the Conti's do look slightly worn on the front.
What mileage do you change yours over at? I've seen some people say you can get anything from 10k to 16k out of a set. It seems a little soon to be worrying about tyre wear with less than 5000 miles on, but that's a performance car for me I guess.