After seeing those last few pics I can finally tell that the guantlets aren't sculpted onto the forearms just like I originally thought. I know a few pages back there was a pic of P1 with AVP gauntlets on, but Devil_666 made the comment that it could very easily just be an entire forearm swap.
I know a lot may not even care, but it makes me a bit happier to know for sure now. In pretty much every pic prior to that last set where you could get a good view of the left gauntlet you could see that the hinge of the elbow lined up with the little square towards the wrist of the gauntlet.
On that last batch you can clearly see that it doesn't.
So either they are indeed separate pieces of armour, or HT has developed some new swivel joint hidden inside. I doubt it's a swivel joint though, because there are several photos where you can clearly see the netting on the left arm pulled under the gauntlet.
The netting under the gauntlet was what made me initially think they would be separate pieces way back when we saw the first teasers.