I'm not at all surprised that many people (including myself) are steering well clear of iOS Vista, but I wouldn't give very much credence to any supposed statistics from StatCounter. It might have been a relatively popular thing to add by some web developers on some websites a long long time ago (think Yahoo / AltaVista / web rings era), but I use NoScript to protect my privacy and virtually never see StatCounter in the list of third-party sites when reviewing my permitted script settings on newly visited sites. StatCounter really doesn't have the broad overview of a wide range of website visitors that it likes to still try to convince people that it has, it's just trying to prop up a fading long past reputation these days…