Here is a video of 11 guys playing what one kid on an accordion played:
https://www.youtube.com/watch?v=pe-MIDDfckw

I have an accordion which I play terribly so I know what Flatfoot is saying about the massiveness of that left side, but I don't hear any dragging on the 16'th notes. I may not have a finely enough tuned ear, however. I thought it was an incredible performance, not at all awkward or uncomfortable, not even the 5'th time I listened! :-)

Paul