If there's another performance like this, I'm sure we'll see the winning car impounded post race for a long scrutineer session by the marshals. It's that or Vettel is the best F1 driver of all time, just like Lance Armstrong was the best cyclist. Looking at the onboard pole lap Vettel wasn't even pushing the car with minimal steering effort while Rosberg's lap was lunacy by comparison.
I hope Vettel is that good and Newey is that good and Webber is that bad so this is just another conspiracy theory, but it's not as if we haven't see Red Bull dominate a circuit or a run of races, and then after closer inspection of the car in the next circuit their pace is back to that of mere mortals.
So, are you saying that if Vettel is unable to dominate as much as at Singapore in say, Korea, that is a good enough reason to smell a rat?
Have you considered more a logical explanation like the whole package car-driver-circuit happened to jell at Singapore? There have been other races in the past where drivers have dominated as a one-off. Gor example, Gerhard Beger was a very good but not great driver but at Hockenheim often seemed a head-and-shoulders above rest of the field.
PS: By the way WB, the significance of the object you chose for comparison, Lance Armstrong, was not lost on me. With respect, I think the insinuation is pathetic.