Recently, I have seen LOADS of Galaxy S3s, TONS of iPhone 4's (as usual, but it seems like a lot more. Like, sitting on a bus or in class and seeing 90% of the class whip out a iPhone 4 to text or whatever. Its actually a little uncomfortable), few iPhone 5s still, and just other random phones. iPhone 4 and GS3 lead the way, followed by I5 from what im seeing.
As for the Nexus 4, I have not seen one but have gotten "oohhh"s and "ahhhh"s from folks who have seen me holding one. Think I said this on anther thread, but even an iPhone 5 owner marveled at the beauty of the screen and body. The thing is, this phone catches a lot of peoples eyes when they see it. Its a beautiful phone that just looks like a sexy black slab of sexiness. Sadly, when ppl then ask me what kind of phone it is, they're left confused because majority of the time they've never even heard of it.
I never see any Nexus though. Before I got this N4, I had only ever held a Galaxy Nexus once but seen it in videos a lot and loved that design. In fact, when it was so tough for me to get the N4 I was considering just selling my GS2 for the Galaxy Nexus and just settling with that because I love the screen and knew itd get 4.2 anyway. Glad I was patient though.