That's what I read as well.Elon's referring to regen being disabled or reduced when charging above 95%. There's no difference in regen at lower charge levels.
A quick caveat though: If you're charging at the top of a mountain, a 90% charge might become a 95% charge rather quickly as you make you way off the mountain. So capping out at 70% (or less) might be a good idea if you value "regen behaving consistently" on the way down.