Let's not go down the BS path with bubbles in the oil...
I thought I would ask an expert about your opine and maybe you just don't like the poor wording of "bubbles" his reply (and just his opinion I understand) ...
"If the oil level is too high, it can contact moving parts in such a manner as air is mixed into it. The result is air pockets oil galleries, and less liquid oil to cool parts such as piston skirts. The "foam" also sticks in places and doesn't drain back to the pan, and could insulate parts from normal heat transfer."
I think some situations where high rps is constant a good bit of oil stays in the head so the crank thinks the level is low to normal so that is why they run it a bit high, but sitting at a red light it all would be in the pan. Maybe a zook engine the sump isn't in close enough proximity to the crank etc but I still stick with foam doesn't lube well and I would rather a little low than high and think he has nothing to worry about.