I may not be seeing the difference that Android Eclair is making on the population of people that have it, but I wouldn't expect the high percentage of people who have already gotten the upgrade to Eclair. According to the Android Developers site, half of all running Android devices are running Android Eclair 2.1. This isn't about the number of phone models running Android either, it means that 50% of the total number of Android handsets in use right now are running Eclair. So who was saying that fragmentation is a big problem? Granted, this is only half of the population of Android users. Still, 25% of handsets are running Android 1.6 Donut, with 24.6% running Android 1.5 Cupcake, and the other minimal .4% running versions caught in between and outside of those numbers. It is also something to note that these numbers are based upon the devices that have accessed the Android market for the 2 weeks prior to June 16, 2010. [AndroidDeveloper]