Yeah seriously, I have no idea what these Zealots are screaming about. Ubuntu brought Nvidia to EGL (Mir & Wayland) single handedly. They are acticly working with Nvidia to go this. NO ONE in wayland seems to have even got Nvidia to entertain the idea. Seems like a success story to me.
Nvidia said they were working on EGL support at XDC2012 in Spetember, six months ago, so I would think Wayland is more likely than Mir to have been a factor in that decision.