I don't agree that the AUSCP statement necessarily means that a "huge percentage" of priests are gay. That makes as much sense as saying that supporting women's ordination means one must be female. Some people really do stand up for what they believe is right, even when it doesn't profit them personally.

That said, I have no doubt there are many gay priests and, obviously, most are closeted. But if that's the case, the reason is that they serve in an institution that still considers homosexuality an impediment to holy orders. Who can blame them for not wanting to deal with all the nonsense that would inevitably follow if they came out?