Quote - Also they claim rendering is faster...but i don't trust that. if it's much better looking how can it be faster?

The renderer will be multi threaded, which means that if you are running a multi core system your rendering will be faster. You would have known this had you actually read the text on E-frontiers homepage, it's quite clearly stated.

Quote - Reason 4. Render up to four times faster with Multi-threaded Rendering on machines with multiple CPUs. FireFly takes advantage of the processing power of the multi-core and multi-processor systems available on the market by rendering on up to four threads simultaneously. This optimization results in much shorter render times for most scenes.