As an owner of an affected 15", and I have been following this issue left and right, I would suggest anyone that wants to have this fixed, wait a couple weeks, and you will have a better chance of a timely repair.
I have had my machine in for almost a week now and it is still "waiting for repair" and people at Apple saying that the part is already there. But some people are also being told 2 weeks for the repair, while they're telling me a couple more days and I should have it back (confusing me). If the technician I had talked to didn't assure me that they had a real fix for it last monday, I would not have sent it in, but (to me) it seems as though they may still be waiting for revised parts to be delivered, or to catch up with demand.
My point being: If you notice these spots, and you can not be without your machine for more than the 3-5 business days that it usually takes them, (normally I am very pleased with a timely return), I would recommend you wait for a couple or more weeks until they have received an adequate supply of new parts, and wait out the initial rush for these parts. Your machine will get back to you in the timely manner Apple usually does, and most likely the techs will have done enough of them to do them in their sleep, so less worries about a second repair.
