I guess these numbers will increase as mobile vendors provide better ROMs with their mobiles. I bought a LG Optimus one to get started on Android (a year ago)and I got sick of its LG ROM in two weeks flat. Then I rooted it and put a custom ROM from XDA forums (with a custom optimised Kernel). I couldn't be more happier with my mobile's performance than this. Also I hear some new models of LG, HTC, Samsung have minimal default apps and lightweight ROMs now. So people don't have to be frustrated with un-removable built in apps and crap default home launchers. This will certainly get usability freaks (like me) interested.