I've been using the 20D for over a year. It is basically an instant on camera and almost instantly returns from "hibernation". If your camera is having the problem you report, then there is something wrong with the camera. Two things to check, however. First make sure that the battery is not at the very end of its charge (so test with a fresh battery). Be sure there is no problem with the CF card. The CF card is read by the camera as it comes back from hibernation. A problem with the card, could delay the return. So check with a card other than the one you normally use. If you have more than one card, check each.