"In case I wasn't altogether clear, one of the points of my post was that the statement about the bodies of the Jerusalem saints being "raised" didn't necessarily mean that they were resurrected (contra the NIV's paraphrase, "raised to life" -- the words "to life" aren't in the Greek text); it is capable of meaning that the saints' bodies were exposed to view from observers on the surface."If that were the case it would seem odd then that only saints' bodies should be exposed due to an earthquake, and not the hundreds and thousands on non-saints. Obviously it sounds more like something happening exclusively to holy types.
However, to go the other way and suggest it happened in a collective vision has it's own problem: If The Bible is to flit between reality and visions without warning there's no reason to say the resurrection itself wasn't also a collective vision since it similarly involved the dead reappearing but only to a small group of people.
