Nope, it doesn’t count temps at all. This is easily Googleable.

That counts people who weren't a good fit and were let go early after hiring, mass layoffs, and mixes mixes startups and FAANG and consulting churn, none of which is the typical corporate IT worker scenario, and all of which bring the average down (but are not "hopping").

Corporate IT, government IT, smaller SMEs, and stable SaaS, have higher averages.

Again do you have any actual evidence? Citations?