Hmm. Arguably it would be unlikely- Moffat's stock was less high in 2005 than it is now. Yes, he'd done Coupling, but he didn't have Sherlock, or Tintin, or his Who episodes for RTD for that matter, behind him, whereas RTD had just done The Second Coming. Still...
I can't see Moffat's Who amassing quite the same mainstream appeal as RTD's, frankly. RTD pitched things very cleverly so as to appeal to a broad audience. Yes, I personally prefer Moffat's stuff to RTD's, but that's because it's pitched more at people like me, not that it's necessarily any better. Moffat took over an established show; his job description was very different. He would have had to have done something very different in 2005. Still, we'd probably have ended up with a programme regarded as rather more "cult" than it is in OTL today, although still successful.
An ionterestiung question; someone whould have presumably taken over from Moffat by now- who?