Sebastian Vettel's dominance this year is not comparable to 2009.
That is the view of Jenson Button, who won the championship two years ago after a start to the season similarly as meteoric as Vettel's this year.
But Briton Button, now with McLaren, claims the situation at Brawn GP in 2009 was vastly different to Vettel's at Red Bull.
"We had no money," he is quoted as saying by f1today.nl. "We had a good car at the start of the season but could not develop it. Red Bull can keep it up."
According to laola1.at, Vettel's start to 2011 is not just as meteoric as Button in 2009, but also Jim Clark in 1965, Jackie Stewart in 1969, Nigel Mansell in 1992 and Michael Schumacher in '94, 02 and '04.
He is in great form in a great car
On every occasion, the driver went on to be champion.
"He is in great form in a great car and a team behind him so that only abnormal things can stop him now," former driver Alex Wurz told Kleine Zeitung newspaper on Tuesday.
"The title for him is at hand."