Hmmm, so Honda, then BMW, now Toyota.
What's interesting is that some of the small independents who have purchased manufacturer engines have outperformed the manufacturer teams with big budgets (Brawn beat McLaren, Red Bull beat Renault). I know this year was a bit of an odd one in terms of development cycles and KERS / non KERS, but when the FIA are looking to reduce running costs, extend season lengths / exposure / chance to win points the big boys are going off to lick their wounds.
I always expected more from BMW after their success in 2008, and hoped they'd be back for more in 2010.
Makes you wonder how long Lotus or other newbies will stick at it if they can't win from the off.