I've often had a belief and even more so now that teams are starting to zip off the line and gain places using it, that the "no KERS for 2010" issue was more down to a two fingured salute in Max Mosleys direction than any real reason.
It was helped that during the first half of the season KERS never really proved to be that effective. Weather it was down to the design of the system or the fact that the Brawns were so far ahead that having KERS made no difference I'm not sure. Looking at it another way, the only way Ferrari avoided a few blushes by being trounced by a Force India was the fact that their cars were carrying KERS. With a part that carrys that much influence now would any one be silly enough to drop it.
I bet Williams are just forcing a few hands here and that secretly most FOTA teams will be pleased that they get a chance to use their KERS buttons next season. With 6 more cars to pass next year that may be as slow as a house brick on a roller skate I think the front runners will need KERS more than ever.