Unfortunately I couldn't satisfy my curiosity by finding a higher resolution image to simply read the top of the headband, but perhaps someone can identify them by design?
I recognize them but no one really cares about whos sportin them but if you do, they use UE custom's
I think it can go both ways, no one's really surprised that people sport M50s in the studio by now. Frankly I find the people more interesting than the headphones they're wearing in this case. "Wow M50s, actual people wearing headphones we talk about on head-fi"...yeah, no.
Care to source pics/links regarding them using UE stuff? It's hard to differentiate between models and brands, unless they've stated it outright.