If Lewis stays out of trouble and actually finishes races i'm certain he'll finish above Button at the end of the season.
He had 3 retirements in 2011-
canada which was mostly his fault but also due to bad conditions as he went into button who was going much much slower at the time.
Belgian was his fault for thinking a overtake was done with while kobayashi disagreed.
Brazil was a technical failure as his gearbox failed.
Just had to have a laugh at reading through hamiltons wiki page, so many silly little comments and exaggerations, such as making out that hamilton rammed massa out of the monaco race while chuckling and twirling his moustache.