I believe so. I feel like someone even confirmed that XP carries over when you actually unlock the specializations.
Don't hold me to that though...
You can still unlock commendations, TC, as he says here, but no, the XP does not carry over as I can attest to. It ticked me off too because I had a ton of XP I was hoping to get passing the commendations and such I did waiting for my code.
Some guy here did make a topic claiming it did, but I just think he's confused.