First off, vista has been around since 06, has apple really gone from 5% to 10% in just three years or was it part of a continuing trend?
Second, jobs is back in june, how that is a year without him ill never know.
I'm pretty sure that yes, the market share has doubled in that three years. Apple went from the 6th computer company around 4-5 years ago to being the 4th biggest one now.
And the rumor is that Jobs will be stepping down permanently due to his health. Time will tell.