He's underestimating (though not by a whole lot probably). The 6k numbers from the above article refer to the first 6 months sale. Guttag is talking about the l

He's underestimating (though not by a whole lot probably). The 6k numbers from the above article refer to the first 6 months sale. Guttag is talking about the last 18 months. Also doesn't account for the headsets that have been seeded to devs.