Slow. Oh so slow. I hate having to wait for the bloody animation to finish unwrapping itself before deciding to show me something that wasn't quite what I wanted, and then having to wait again to find a different hot spot to hover over and see what it deigns to tell me.
It might be a clever implementation, but understand this: I browse by opening up to 30 or 40 tabs, then skimming through the first ones while the later ones load. I can touch and flick through literally 60 to 80 pages per minute. (edited: I said hundreds, but that was an exaggeration. However 60 to 80 is conservative when I'm in fast search mode)
You want to slow me down? Don't expect me to visit again. OK, I'm not normal, and I'm not average, but I'm incredibly frustrated by this interface.