Silly, but even Steve Squyers gave a nod...
I'll grant that, but the theory made it all the way to the top. Steve Squyers become aware of it (via Doug Ellison), and when they named "El Dorado", he sent a personal email to "Ustrax", the biggest Ultreya proponent, of the unmannedspaceflight.com forum. Even said that the myth influenced the choosing of the name, in terms of looking for something that doesn't exist.
I like what that says about Squyers, ditto the fact that he's thrilled that so many amateurs are putting effort into creating mosaics, colorizations, etc, rather than just grumbling about them being "unscientific" as some PIs might do. He gets that this is about all of us exploring a new place, and not just about him collecting some new data.