They were CLEARLY not the best all year - they were barely the best for 5 months which is why they went further and further back during and after the summer
It was only because of the huge lead they had from the beginning of the season that JB got the title
Wonders where with the new tech Merc this year would be with a retro fitted engine that lost similar amounts to the Brawn - I would be pretty amazed if they were even in the midpack even with their current performance advantage
No-one can afford to give that kind of performance away in the current situation, it just wouldn't be viable
I would LOVE VW in F1 (and actually think F1 NEEDS VW/Audi/Porsche as much as VW should be there) but cant think of a worse team to go with - although it sounds like it was inevitable given the current links with the drinks company RB (rather than the team).
Wasn't long ago that the VW/Audio group were denying any future involvement in F1...
Until I see something direct from VAG, I'll just take all this with a pinch of salt...