Eh, you have more faith in Apple than I do, my friend.
Here's a quote from another forum:
"I have sent them back laptops for repair that were sold from the Apple store or bought online from the Apple store and they have pulled the extra memory and said it was third party and bad, even though it was installed at the [Apple] factory in China."
http://www.macintouch.com/badram04.html#mar29