Did you watch the live letter? Yoshi was on ARC for a good while. Not only did he mention how ARCs AA would change based on distance, but he demonstrated it as well. He targetted a mob far away and started shooting. Once it got close he switched to punches. Not to mention there was no light shot skill going into cool down in his action bar.
Another interesting idea. He shows his gear menu often when on ARC. We should go back and check to see what he has equipped for arrows, if anything.