Remember a story about how a guy who drove a Pepsi truck was fired when someone saw him drinking a Coke one day. I think people tend to read way too much into these things. I forget what it is off the top of my head, but there's actually a term for a tendency to see patterns where none exist.
The whole Android v iOS v Windows Phone v Everything else is really a matter of personal taste. I tried to make an iPhone 4 work for me, and just couldn't. Android is just a much better fit for my personality. There are plenty of people who are happy with Windows Phone, and I say more power to 'em. Don't think it'd be for me, but they aren't me. There are also several very legitimate reasons he might be using an iPhone. You think Apple doesn't buy a few units of pretty much every major Android phone out there; that it doesn't have its own engineers taking them apart and looking for any ways they might improve their own products?
As much as companies love to prattle on about how innovative they are, few can back up the claims. Apple stopped being innovative around the time the first Macintosh came out. Microsoft has never managed to achieve any level of commercial success with it's attempts at innovation. Google has just been recycling a twist on the dumb terminal concept once it branched out beyond being a search engine. The sad part is Google's managed to do it better, in a lot of cases, than local client solutions, even with the number of drawbacks that come with the Internet being the delivery medium.
Who cares who uses what device? At least now that the iPhone is a bit more ubiquitous than just the upper income yuppie crowd who would go significantly out of their way to show world+dog that they had an iPhone. I would never, but one might be tempted to strangle such a person for being an annoying git. Use what works for you, stop worrying about the next guy.