The OP originally asked for the basis for two aspects of the Gap theory, but then also said they'd welcome answers going the other way. I removed that so that it's only asking for one perspective.
@Onlyheisgood then made an edit suggestion reversing it to ask for the basis against it. I voted against the edit, but because FMShyanguya edited it, it got approved anyway.
Anyone got any good arguments why it shouldn't be rolled back to revision 4?