Don't really know how else to describe it. DS (nearly 2) seems to be averse to the normal bite then chew system. Instead he grabs enormous chunks of food and continually tries to force it into his mouth while chewing on whatever he has managed to get in already.
If things come pre-chopped he'll just keep ramming them in until there is no more space, hand over open mouth to prevent escape.
He didn't seem to have much of a gag reflex as a baby - often there would be a bit of a cough, his eyes would water a little, but nothing ever was forced back out.
He is pretty good with a spoon and fork, the problem just arises with finger food, but that is quite a high proportion of his meals and snacks.