It's funny, I just had a reverse experiance of what you are all saying. Not on the retail side, but on the repair side. I had a problem with my MBP, I had put a bad CD in it (that I didn't know was bad at the time) that was not letting it boot. The guy at the apple store genius bar said I had a bad logic board, and it had to be sent back. He said there was also no way to get the CD out short of taking the optical drive apart. Since I have had accidental damage to my computer, he said Apple won't cover it, and they'll charge me $1,248 to fix it.
I left there in a storm, and went to CompUSA. The guy there stuck an index card in my drive, the CD popped out, and it's working fine. No charge, fixed in 3 minutes