in slams, yes. Only Djokovic is above him.
He didn't even play Federer in a hardcourtslam. and Federer was a lot closer to beating Djokovic than Nadal was to beating djokovic. I rate Federers chances higher in a hardcourt slam than Nadals.
If I make up some numbers which I feel are about fair
I would give nadal about 55-65 percent to win RG, now Djokovic has a clear edge against him. he could very well win AO or WIM but isn't the biggest of favorites there (more like 2-4th). I would give him in total 80% to win one this year and 70% to win one next year, making it about 55% he beats the record.
Would be a really impressive achievement if he gets the record!