I figured you'd say that. If you find a conservative survey of gay children in this respect, I will take your objection seriously. Somehow, I doubt they'd be willing. Even if you reduce it by 2/3rds to account for Lambda's agenda (whatever that is), you're still left with a disporportionate rate.
Perhaps you'd care in any case to speculate about Lambda's sinister agenda? To promote homosexuality? Why in the world would they fabricate such a statistic?
The high dropout rate among gay kids, like the high suicide rate, is such a known fact among people in school counseling that I'm amazed you question it. Why do you find it so hard to believe? This is not a new school. It's been around dealing with this problem for 20 years. You think we just made it up last week?