Lewis Hamilton has admitted he is happy to have "proved people wrong" after leaving McLaren.Many critics rounded on the 2008 World champion when he announced his decision to leave McLaren, an established top team, for the recently under-performing Mercedes in 2013 and beyond.BETTER THAN BUTTONHamilton's new W04 looked competitive in winter testing and then in Melbourne (March 17), while the 2013 McLaren is struggling.Guardian correspondent Paul Weaver said: "Lewis Hamilton recently acquired a dog and so, it seems, has Jenson Button; only Button is driving his."Hamilton cannot hide his joy at the situation, aiming fire at his critics including Sirs Stirling Moss and Jackie Stewart: "They don't know what they're talking about."It's nice to prove people wrong. It has been everyone (criticising), particularly all the ex-drivers commenting that it was the worst decision ever."The team (Mercedes) have done well, I'm really proud of my team. I'm proud of my decision as well.” Stay with Wheels24 for the 2013 Formula 1 season – fresh reports every day.