Many of the criteria that people say Vettel needs to fulfill to be great are the same as those levelled at others for opposing reasons.
One that springs to mind is that Button is unable to put the car on pole and win.
The Red Bull did not seem to have the magic in quali early this year, yet Vettel is still there, after maximising his position, and despite occurences like Valencia. I cannot say for certain, but I have a feeling that if it was a different driver, this would be looked at very differently.
in 2010 he was never in the lead until the very end, and pulled it off, he could have lost it, considering the number of points he lost earlier in the season, but he kept on it. As did the team.
Hakkinen won 2 WDC in a Newey car, yet he is highly regarded, although his campaigns were assisted by DC and MS breaking a leg.
Dare I say it, I think there are those who simply resent his success, and therefore fit reasons around it, all perfectly reasonable reasons on face value, but if you start from a particular premise, you can find all sorts of ways to justify them.
So what if he has ended up in the best car? Many have fallen long before they make it, the Red Bull young driver programme seems to be rather unforgiving of underperformance, besides, I am sure he would not be there if he was not capable of winning.
I cannot help thinking that it does not really matter what he achieves, opinion is unlikely to change.