FTA:
" If viewed on a VR-compatible device, the user will be placed inside a sphere of these profile photos with the ability to change the classification of each member using a gaze-controlled cursor to click on them. "
>60 fps has been done. But, it is not reliable yet.
By "running well" I mean within the limitations of the framerate browsers can currently produce, which is definitely not 90 or 120 fps.
The best performance I've had with WebVR has been a very stable 75 fps in Firefox using this configuration: https://mail.mozilla.org/pipermail/web-vr-discuss/2015-Novem...
With a Cardboard viewer, A-Frame demos feel pretty consistent with native Cardboard demos to me (tried iOS + Android). But obviously I'd rather try this out with an HMD, and haven't been able to yet. Hoping to pre-order one tomorrow. :)