Chickanic is a joke. She didn't retune between fuels, the "testing" she did was absolutely worthless. When I left a comment stating that, she deleted the comment, multiple times. I'm suspecting she wants folks to use pump fuel and generate more business for her.
Almost all saw owners should be using premix fuel. The folks on this site don't count, y'all make up less than 1% of saw owners. Most saw owners have a Wild Thing that they pull out of the case twice a year to trim a limb that came down in a storm. On a heavy use year, they might go through an entire tank of fuel cutting up some firewood for a camp fire. They burn less than a quart of fuel a year, and if they're going to have a gas saw at all, then premix is PERFECT for them.