I don't think Dark Circle will have delays or at least not to many if they do have any. The writers and artist they picked don't seem that busy in comics outside of Dark Circle. I mean the writers of The Shield write books, but I have never seen that delay a writer for comics before. (Plus there is two of them).
Though even if there is delays, I would never drop a title that I liked due to delays. If the character, story, art or anything else is really good. It will still be good two months later (assuming issue 2 is just as good as issue 1, but I generally wait for reviews before buying or I sometimes trust a writer/artist that I know alway do good).