And Gaudio won a GS with no #1, and Rios was #1 with no GS so...?
Rios won several masters in addition to this #1. Gaudio only reached one TMS final so he didn't back his success up, Rios did.
IMO weeks at #1 only comes into play if two players have very identical careers (slams, masters wins)
For example Roddick and Murray's careers are pretty much dead even, yet I think at this stage it's R-Andy who has the slight edge due to his #1 ranking. But if M-Andy gets even 1 week at the summit, he will pass him straight away.