Ok I just tried the browser on my 3G wifi and it doesn't feel as intuitive as Safari. Unlike Safari it doesn't seem to scale down the pictures to fit the screen and the scrolling feels a bit unintuitive when zoomed in. I didn't really notice huge improvement in load times compared to Safari either. This is only from a few minutes of usage though and I'll probably test this a big longer before I make any final conclusions.
I just tried it on my 3G iPod Touch with WiFi and it is not faster than Atomic Web Browser which is my preferred browser. OM also scales down the web sites so much that I have to zoom in on every site. But it is still better than Safari.