GameStop has a listed ship date of 6/7/05 for Killer 7.
I see this as a good thing because that's after E3, so chances are more than likely that they will have a playable demo at E3.
Also, generally, if a game is listed with a month but no specific date, or if it's listed for the 1st, 15th, or 31st, that means it's tentative and could be pushed back.
But a set date like 6/7/05 is pretty much a good sign.