I imported around 2,x Mio hands yesterday and needed around 11-12 hours (55 hands/s) which is faster than PT3 (would say 2-3 hours if u include housekeeping) but I hope there will be future improvements in speed as well.
I would suggest that you instantly move imported hand files into another folder (what is not the case right now if I am not wrong?) so that it will be possible to stop the import at any time and start at the same point later without importing the duplicates again.
I am using a i7-2600 CPU@3,4 GHz and 4 B Ram btw.
PS: How can I see a list of all players? right now I am seeing my allias but no one else maybe I`m too dumb to see the list ;D (like the player list in PT3 where I can click on every single player in my database)
