Seriously though, you independently generated the autogynephilia hypothesis? If you did, that's pretty strong evidence for it. I agree there's a gap between young-transition and old-transition women, though I've seen Dan Savage spout some serious bullshit before so maybe we're seeing a pattern that isn't there.

It's consistent with my (admittedly anecdotal) observations as well.

If there are multiple clusters, I would expect them to be similar among MTFs and FTMs, because of the other similarities (e.g. number of transpeople in each). Is there any evidence of autoandrophilia?

FTMs seem to be generally attracted to women. Savage also claimed that most FTMs are attracted to women. There also seems to be fewer FTM than MTF. This seems to support the view that most FTMs are male-minded and not fetishists.