I got my -8 QB kit in May 2007, and it was the older style fuselage. They had been shipping the pre-punch kits for some time by then, but the QB's that were coming back were still from the older kits. I don't know when the pre-punch QB's finally made it in, but I did see one at the factory in January.
From a QB standpoint, there are some interesting differences. Some things completed on mine are left undone on the pre-punch QB, and visa versa. If you think you might want to go fast-back, then the newer QB is the way to go, since the rear top skin is not installed.