The 3D sliders were terribly slow on my computer (Chrome, latest.) Is it just a setting that can be tweeked or is the delay due to the library? Otherwise, very cool fade and choices like that.
Here it wasn't slow, but it wasn't quite as smooth as I expected. Is it being manually animated by JS, without using requestAnimationFrame or CSS transitions?
CSS 3D transforms are hardware accelerated on iOS, so yes they will look great. Chances are the parent poster isn't getting H/W acceleration, possibly due to driver issues etc.
Your browser must not support 3D transitions so the plugin degrades to the fade transition. Try one of the latest Chrome/Safari/Firefox browsers to see the 3D scrolling.