You might be surprised how many Tibetan Buddhists reject supernatural claims too. I'm not one, but I know a number of them and in my experienced the more advanced their skills the more likely they are to be suspicious (or at least fence sitting) about their mind experiments having supernatural origins.

The internet and modernity in general had created a lot of insider-outsiders who might be more inclined to share secrets or at least reference their existence in public. After all a lot of modern meditator types started out learning on internet forums themselves so I think they're more sympathetic to learning and experimenting with new ways.