What percent of your friends (born in the 90s) would you say ever, at any point in time, experienced corporal punishment?

I'm not sure but i know a fair few of the guys i grew up with had the same experience.

Do you think it varies widely by gender/class/immigrant vs non-immigrant status?

I assume the more educated families are probably more lenient and understanding when it comes to child rearing than the those who do not have any sort of education. My parents don't have any educations and i know a few of my friend's parents don't either.

Immigrants can be a hit or miss (hah) cause i know some muslim families that definitely hit their male children and i know some who don't even try to correct any behavior in their male children cause they can do no wrong.