Well I was able to exchange it for a new one after all, but they weren't exactly very willing at first.
The genius guy tried to tell me it was only 1 dead pixel, and then proceeded to recite the dead pixel "anomaly" speech for me. I told him there's no way it's just 1 dead, as I probably wouldn't notice just 1 dead pixel on a 23" display at 1920x1200 resolution. "I just see one, and in my opinion that's an acceptable limit" he says.
Well, I'm being polite but firm, so I respond that it's clearly more than just one, and either way for $1200 that annoying black dot right in the dead center of the screen is not an acceptable limit for me. He went to talk to his manager, and she says they will allow me to exchange it "just this once." I say ok but insist on plugging it up 1st before taking it home.
The funny part of this story was what the manager told me upon checking out: "If there's something about this one that you don't like, then maybe Apple displays are not right for you."
She totally said that with a straight face. I just laughed and asked her if Apple displays aren't right for me, then what is? She didn't say anything.
I wasn't even rude and they treat me like that, geez. I laughed it off though, and told my wife that Apple Store tried to break up with me, and gave me the "it's not you it's me" line. LOL.
Anyway no dead pixels or color casts on this one. Everything is great. Thanks for the advice guys.
