I have not seen anyone contradict what they or EPEAT are saying about this. If there are professionals/experts out there who think that the retina MBP is as easy to recycle as the previous design of MBP, or that having the battery glued doesn't affect how easy or safe it is to replace, then I'm open to changing my mind. But intuitively, this would not seem to be the case.
How does a user-replaceable battery guarantee that it will be properly disposed of?
If anybody can replace the battery, then there's a good chance the duff one will end up in the kitchen bin.