TA DA! My poor nerve rattled friend who has more patience than a gaggle of nuns proves the point!
There is "descriptive" noticing of race, religion, sexuality and discriminatory noticing.
And where this girl is probably who she is today BECAUSE of being in a wheelchair, once you know her, it no longer becomes her. I doubt you see her everyday and think, "Great, here comes the gimp".
It IS possible to look at a picture of a friend (or a celebrity that you're used to seeing) and no longer see "black man" to just see "guy". I don't think it's necessarily PC, I think it's just human nature. I can think of many friends that my first impressions weren't good. They were scary, creepy looking, short, fat, bald...whatever. Now, when I see them, I just see and feel love.
It's not exactly not seeing color, it's more about seeing the person you recognize and know.
I think BotD is right that we shouldn't feel like we HAVE to look past people's differences from moment 1. And, we should realize that those differences are what made them who they are. But, I don't think people are deluding themselves to say they saw the picture and saw a guy and didn't see his color. He's famous, we "know" him and I think it's just nature that in those situations we naturally just see "person".