I actually wouldn't be surprised if those stats are true. When I started transition, part of me was looking toward the end goal as this amazing heavenly sanctuary where, once I got there, baby angels would fall out of the sky and heavenly choruses would sing and I'd never be miserable again. And I'm afraid a lot of people go into it with these same kinds of delusions of grandeur, not even thinking about the negatives.
Well, guess what? It's not like that. It's not like that at all. If anything, transition has taught me how little the two sexes are really different. And yet the social difference, how others see you, is so significant that I can imagine a lot of people are disappointed when they finally reach the end, and realize that it's not the divine revelation they expected it to be, and yet the way other people treat them is so different.
Hell, even I had to recheck my motives after I started going public and realizing that it wasn't such a big deal. The reason why I have kept going despite being very disappointed with this lack of "divine revelation" is because I realized that when I look at myself in the mirror in "girl mode," I smile, and I actually feel happy with myself, which is something that I NEVER feel in "guy mode."
But I imagine that there are quite a few who, when they start with the real-life experience, or when they start hormones, quickly realize that it's not what they thought it was going to be, and quit.
But hey, that's okay. So it's not right for them. Big deal. Transition isn't for everyone. It's all about what makes each individual person happy. And if detransitioning and quitting hormones makes them happier, then that's what they should do.