I agree, it's a pretty difficult subject. But he actually did say that. They got to the date and he realized that he wasn't interested, but he still treated her well and even she admits that she had a nice time. In the note he sent her, he says,

So whilst I am hugely turned on by your mind, your face, your personality (and God ... I really, really am), I can’t say the same about your figure. So I can sit there and flirt and have the most incredibly fun evening, but I have this awful feeling that when we got undressed my body would let me down. I don’t want that to happen

and

I’m so disappointed in myself Michelle because I’ve genuinely not felt this way about anyone in ages, but I’m trying to be honest with you without sounding like a total knobhead.

and

I guess what I’m trying to say is that I’m trying to avoid bigger pain in the future by telling you now so we don’t have to go through that embarrassment. I’m a man ... With all the red hot lusts of a man and all the failings of a man and I’m sure of my own body and its needs. Please try and forgive me.

She chose to go public with it and turn it into a body-shaming issue. I don't think that he did anything wrong. It's just too bad that they weren't compatible I guess : )