Instead of version, I think it would be more accurate to say 3.8% time (two out of fifty-two weeks). 20% time would be over ten weeks by my arithmetic. Although I think it's a generous gesture for a mega cap like Apple, I think this is a little silly. At a big company such as Apple can't you gain or lose 3.8% of your day simply by shuffling around your coffee break or gratuitous meeting schedule?