Not exactly. If the here you are referring to is INGO much of the discussion seems to be about .30 cal in a large case(ie 7.62x51) vs. the 5.56. If the here is the military they, or at least most of the example cartridges being referenced are also of the 7.62x51 size. Both INGO and the military seems to be fixated on relatively heavy for caliber bullets.
Hmm. Well I guess you kinda pointed it out, but you're right, I was referring to the larger discussion.
By my way of thinking, anything in the range between Grendel and 6.5 Lapua is a pretty small casing. I think I said it earlier, but if not, then my opinion is that a 6.5mm 123 is about ideal. Funny I said that, because per the linked articles here, the AMU is apparently already going the same place. Seeing as we study the same game, and shoot it together, I'm never really surprised to hear that somebody else 'already did that'. I'm always late to the party.
But if the rifle is supposed to still be used to kick doors, a rifle with the recoil level of a .308 M14 is just about a non-option at this point (I'd think), even thought the .308 is only a low-to-medium capacity cartridge in it's own right.
Not until you get to the UM .30's and then into heavy 8mm and 35's do you get truly into "medium rifle" rounds. But that's mostly lost on the American mind at this point, so I might as well leave that to pedantic types. Wait a minute...
-Nate