So earlier in the week, I was told I would get an e-mail with instructions on how to return my yellowed MBP within 48 hours. Well it's been more than 3 days. I called AppleCare this afternoon and after being put on hold for 15 minutes, I was told I would have to call back tomorrow (Sunday) because sales support was closed, yet the rep didn't know whether sales support would be open on Sunday.
I don't mind having to go through the exchange process but I find unknowledgeable reps (though friendly) just about as annoying as being given certain expectations (i.e. e-mail in 48 hours) and the company failing to meet those expecatations.
Same thing happened to me. I called in on a wednesday, and as told i would get an email within 24 hours. i called back in 30 hours asking for my email. I got ahold of some manager and he said he put the exchange through the system again and i should get it on friday, or monday since it might be after the cutoff for the weekend. got the email on friday. sent it back friday. got my replacement the next monday (10 days later) and it was also yellow.