Very smooth on this side too (Chrome 26 on OS X). The graphics looks a bit jagged. Is that a WebGL restriction or is it the demo itself? I am not very familiar with WebGL.
Curiously I get this message in both Chrome 27 and 29 on OS X:
Whoopsie daisy!
Your browser doesn't seem to support HTML5 and WebGL. The best thing to do is upgrade to a modern browser that supports all the awesome things the web has to offer.
You may have to toggle the webgl flag on Chrome on OSX.
"Check in chrome://flags and see if "Disable WebGL" flag has been set. Also, take a peek at chrome://gpu and see if it's showing any messages indicating why WebGL may be disabled."
