Fair enough, but if someone tried to suggest that the 747 was created in seven days by an invisible man who lived in the sky, I don't think we'd take him seriously.
I'm agnostic (or maybe not, I'm not sure...) so I don't categorically deny the possibility that we and the universe we live in is the handiwork of some "thing"- but I would stil see the creation in a sort of deist, cosmic watchmaker way, not an "Abracadabra watch me pull a cosmos out of my hat" sort of thing.
Is that really what it says? Anyway for a being with the power to create a universe- 7 seconds, 7 days, 7 gazillion years it makes no difference. I don't think the point was the days, but the creator. Playing around with the time doesn't make one theory or the other more or less acceptable. The point is that the origin of the universe was an act of creation.