I thought the Specializations were just like a separate level that go up as you use them? That has nothing to do with your real rank?
Oh, yeah, I wouldn't get giddy about numbered ranks yet. Two reasons, only you can see them, and this isn't really confirmation that they are numbered. It just confirms that there are 50 ranks. We have already seen that the ranks are just like Reach's in that they aren't numbered. Maybe there will be a number in Parenthesis that shows what numbered level you are?
One more thing, I love the Rogue Specialization armor. It actually goes together for once. Past Halo games failed at matching the armor. -.-