I think you're right regarding the clarification on the support for Exchange binaries. When I went to find the quote for my reply above I noticed it looked different. Thanks for confirming I'm not going crazy!
Best of luck in the storage move. With Storage vMotion you should be able to do it all online without any downtime. Or worst case since you're already on Exchange 2010 you can just do an online mailbox migration which won't impact end users. You've got lots of options.
Matt