Best time for Hamilton to leave IMO and as mentioned, to work with Ross Brawn is a big insentive, got to be better than than tit Witmarsh, he needs sacking. Yes it's probably got a lot to do with the money and if that's his sole reason, he's a plank. If your earning £10million a year do you really need £15 million?
It would appear, according to the interweb that McLaren are developing their own engine and have been since 2009 when thee deal to end their partnership with Mercedes was announced. Can't see that engine coming straight out of the box and winning races/championships but who knows.
Great move by Mclaren to bag Perez, one to watch. I think this will make for a far better championship with Hamilton at Mercedes. We will have Hamilton, Perez, Vettel and Alonso all gunning for it.
Does seem like Vettel may be inline to join Gonzo at Ferrari in 2 years time.