meaning it wasn't his high level of play but was top guys underperforming and won't likely to happen again also easy DRAWS do hurt
I wouldn't be sure it will never happen again. For him to go on such runs on HC, he needs Djokovic to play at least a bit under his best level (which could happen, players rarely play on their top level). There is no denying Djokovic is the best HC player in today's game. Maybe he can beat top Djokovic on hard once in a while, but he can't beat him consistently. He will not win 3-4 consecutive matches against him on HC, that's for sure, so he needs some upsets and some bellow par performances from Djokovic along the way.
The same with Djokovic on clay. For him to sweep the whole clay season, he needs Rafa to play bellow par. Would you call Djokovic winnign RG and 2 clay masters a fluke? I think this would be 'more of a fluke' than Rafa's hardcourt run this year.
Anyway, I find it funny that there are more people that rate Rafa's HC run in 2013 a fluke than people that rate Del Potro's 2009 run a fluke.