Yeah, I've heard that. This sounds like a major case of rebellion/backlash to me, but I'm not a parent, so I don't know...but I think it's rather odd that someone so willing to comment on someone else's offspring wouldn't be open and forthcoming regarding his own.
I think it's rather odd that someone with the same problem at home would have such an apparent lack of compassion for someone else with a lesbian daughter, or for someone else's lesbian daughter.
And, GMTA!
Oh, I'm sure she'll find a way to lick this problem.