I think there is a lot of truth there. But i think that is less of an issue with efi. Carbs will wash the cylinders down especially if the choke is problematic, causing oil dilution and accelerated wear. That is why cylinders in newer engines often still look good with piles of miles on them. But i think engines warm up faster under load and thus lean out sooner than an engine just idling. I guess that is his point.
I warm it up so the insde is warm when i get in
