Sounds really inaccurate to me. If I had to make a generalisation, it would be that most FTMs I know of are straight, just like most bio guys are straight. There are many gay and bi FTMs, of course. Additionally, it'd be the odd one out who is attracted strictly to other FTMs... that actually sounds more like a fetish than an orientation, to me. My ex-boyfriend is FTM, but that was entirely coincidental.
Personally, I'm bi. At the moment I'm primarily attracted to men, including other FTMs. But I've also found women (including MTFs), androgynes, and genderqueer people attractive.