I assure you in the Valley its not just in coffee shops. I've lived here for 5+ years and the mass majority of folks I come across are Mac users. While its true Mac shares are probably still single digits, in this region, they are dominating.
Very true. But the 'coffee shop metric' makes it sound like they dominate laptops the same way they dominate tablets (where the iPad is something like 60% of the market), and that's not the case.