I spanked both of my kids when they were growing up. One male and one female...
I have the best kids (and grand kids), BTW, in the world. Both are with their original spouses, one is a senior VP of a corporation and and the other is the CEO of his own Corp.
It seemed to work out pretty good. For all of us...
Is it anecdotal?
Yes, but it sounds like you have a great family, so who cares? :)