Vettel's won 6 out of 8, so 75% it's possible. However I have a hard time accepting that the others won't close that gap a bit.Most wins is 13 (from 18, so 72%) (Schumacher)
Interestingly Webber not only has no wins, but he's also only got one second place! If it was all the car, we'd at least expect to see Webber picking up the second places. Red Bull have only had a single one-two finish (Turkey).
Compare that with 2009, where like Seb, Button won six of the first eight races. The difference being Barrichello clocked up three second places.
Also note, after Button's six wins out of eight - he only stood on the podium twice more in the following nine races, never on the top.