Jackie Stewart: Sebastian Vettel not yet a great
To be honest, I wouldnt take any of Stewart's opinions seriously at all(or Lauda's for that matter).
They were both great drivers in their era, but clearly they are no better than some of the fans on this forums when it comes to opinions. I'd be tempted to put Moss in this very same category. Personally, I value the opinion of someone like Damon Hill or Alain Prost far more than these guys, as they always seem to have a sense of balance.
A dominant car is one that actually has qualifying and race pace that no one else can touch.
-> Think Brawn 2009 in the the first half
-> Think Ferrari in 2002 and 2004
-> Or the Williams of 1993 and 1996
-> Or the Mclaren in 1988
and so on. A car that the opposition had no chance of beating on a normal Sunday at the racetrack.
For people out here to say that Vettel has enjoyed machinery even close to that level, they must be kidding themselves. 2011 is probably the only year when he had a car that was clearly better than the opposition. In 2010, he may have had the fastest car, but it was also the most unreliable among the front runners (like the 2005 Mclaren). In 2012, Mclaren, Ferrari and Red Bull all can claim the title of the best car in different parts of the season. At a lot of races this year Vettel has just put his head down and brought home the car in a nondescript 4th or a 5th place and brought in the points.
When Alonso or Hamilton do the same thing, its termed as "the best that car can do".
Everyone who has won a Formula 1 championship in the past 60 years have won it in the best machinery, or machinery that was capable of challenging the best machinery. To put a question mark over Vettel's championships means you also consider the rest of the champions in this sport as lucky since he has won and impressed atleast as much as the other drivers who have won 3 world titles.