That's a nice link Mike.
I think you are right about the "Victory" and M&P revolvers being mostly Navy and Marine. I have seen references to some Marine NCOs and officers getting to choose between revolver or 1911, but I'm sure that was the very rare case where everything just lined up right with cool supply administration and available old stock.
I suppose it was possible some army guys could have had access to 1917s in the same way, especially in the Pacific where they didn't get the latest and best all the time. Though, I've never heard of any US army combat infantry mentioning getting revolvers through official channels either come to think of it.
Regarding pilots, I've read about Navy and Marine aircrew in the Pacific being issued revolvers and fairly ineffective flare rounds to shoot though them to assist in rescue. I've never noticed any USAAC crew wearing revolvers though.