My ds is the same way - my dh calls it 'chipmunking'
The only solution that I've come up with (if you can call it that) is to ensure that everything is bite sized and to limit the amount that I put on his tray - otherwise he just takes handfuls of the bite sized bits and shovels them all in his mouth at once
I also make sure that he deals with whatever is in his mouth (hopefully by swallowing it, but sometimes spitting it out
) before I give him any more.
He is getting better though - even over the past couple of weeks I've noticed that he's using his utensils more and taking more reasonable bites of food. So, my guess is that it's a phase that you're just going to have to wait out. Good luck!