@ zenFoldor:
IGN stated that they understand people calling it 1.5, and that Cliffy B has denied such allegations. They also admit that the cover system has been improved, although they cannot find the 400 improvements that Cliffy B claims and such. They state that it's possible to call it 1.5, although they do not do so themselves. So it's not as if no site ever has alluded to the 1.5 name.