Potentially Kers should aid deceleration and braking and provides a 'power boost' during periods of acceleration.

It looks good for McLaren at the moment but there is a weight penalty to be paid so we'll have to wait and see how much of a performance advantage McLaren can squeeze out of the system.

I wonder if Ferrari are throwing up a smoke screen and are not so far behind with their Kers development as they would like us to think? I only raise the possibility because it's not like Ferrari to 'drop the ball' like they appear to be doing in this case.