In the limited circles I move in here in the midlands, working with people who are more working class than middle class, but being middleclass myself in terms of 'my parent were teachers' and I grew up in a fairly nice area..
4 people at work have iphones, a pretty small percentage. The owner and the reps would have company iphones by now if it were not for ongoing cashflow woes. About half my old friends who I am recently catching up with seem to have iphones. My Dad and Brother got iphones in the last 6 months (and thus didnt want the new iphone to be too good as they cant justify upgrading for some time). From what I can tell most of the people who have not got an iphone do not have one because of price (or not being issued one through work), not seeing the point in a smartphone at all, and for a few its the size of the device or the lack of keyboard that puts them off. Nobody I know in the flesh has ever mentioned Android, WebOS, Windows Phone 7 or lack of flash, two know of Blackberries, one has a crap fake iphone. A few of the iphoneless people have ipod touches. 4 people are quite likely to get ipads within the next 6 months, including my Dad.