Wow, someone who actually remembers that. That is it!
EM has actually done market research on model names and they have selected '&". The first I heard about this was Paul Elio mentioned it during the first town hall way back in the spring. It has occasionally been discussed on here but it gets lost with everything else going on. This has not really been a secret but also has not been discussed much either and while it is always possible for them to change their mind they were serious about it.