Yes.
Simply stated, the F1 World Championship is given to the driver that scores the most points in the season and Button scored the most points. He deserves to be recognized as 2009 World Champion.
Going a little deeper, it is obvious that Brawn's car design, especially that of the rear diffuser, had a lot to do with Button winning 6 of the first 7 races in the 2009 season. Brawn's cars were faster than that of McLaren and Ferrari and the other teams that ran the KERS energy package. As the season progressed and the other teams modified their cars, the gap between Brawn and the other teams lessened considerably. The F1 ban on in season testing also had a lot to do with Brawn's dominance in the first half of the season as changes made to the car could not be tested until practice time on race weekends. Brawn's fast start put the other teams in a difficult position, one that the 2009 rules made that much more difficult to deal with.
Regardless, Brawn played by the rules and their driver won the championship. He deserves a pat on the back and his hand raised in victory.
Jenson Button
Jenson Button has crashed in his career. Most recently in the 2009 Belgium Grand Prix on the 1st lap, his most serious perhaps in the 2003 Monaco Grand Prix qualifying which prevented him from racing.
Through the 2009 season, that was Jenson Button in 2009 driving for Brawn,
Jenson Button won only one in 2009 by 11 points.
The 2009 Formula One World Championship was won by Britain's Jenson Button, with the constructors champions being his Brawn Grand Prix team.
2009 - Brawn and Jenson Button
Jenson Button
The first GP of 2009 was held in Melbourne, Australia, The Australian GP. Jenson Button of the Brawn GP team started on Pole and won the race.
Jenson button folks
Jenson Button
14th.
It was jenson button