I have to admit, I felt pretty slimy going through this. I like a pretty face as much as the next person, but these people (I assume) didn't send in their picture expecting for it to be run through hotornot. Which brings me to the next point...
But after testing it a bit, I'm pretty confident in saying that pretty people propose great panels!
You're kinda hand-wavey here. What sort of data do you have to back this up? And what exactly do you mean by this? Do you mean that attendees have a more enjoyable time interacting with a more visually pleasing panel, or that attractive people are inherently better at running a panel?