> And to think that virtually all the other OEMs barely even support their phones beyond a year and a half. Even Google is only supporting its own phones for 3 years, which is still less than the average lifespan of these phones (iPhones may be higher quality, but I doubt the avg lifespan for other flagship devices is much smaller).

I think the numbers include all Apple devices: iPhones, iPads, Airports, Macintoshes &c.

Certainly, I don't know anyone with a more-than-three-year-old iPhone.