I just started running EM2 today and instantly noticed a speed increase over iView 3.1.3.
In what ways are you finding EM2 faster?
Trying it under Windows Vista and browsing through my images, I found that full-size previews of DNG files took about 3 seconds to render, versus 0.5 second for IVMP. And PSD files are taking about 12 seconds, versus 3 seconds in IVMP.
I upgraded hoping to see some speed improvements. The program does seem zippier in some aspects; but the slow media rendering is very disappointing, and has caused me to go back to IVMP for now.