I just read the Ars review. The weight of the device and the fact that it's strapped to your face like goggles; not worn like a headset, was problematic in the author's opinion.
It was flat-out uncomfortable in his experience.
I guess this is where Palmers experience in VR comes into play. The oculus is more than just a good screen with sensitive accelerometers, it's his design philosophy. Lightweight, small, integrated, lack of wires + peripherals, simple, clean. I must say while I was giving Vive the upperhand due to technology (and both are VERY similar in capabilities) I think the ergonomics of the Rift may actually make it the winner.