It's still a heck of a lot slower than Preview on my (aging) G4 Powerbook.
Actually, on my Intel iMac, I don't even see the splash screen when opening this new reader. It's as fast if not faster than Preview. However, on my 1.33 GHz PB G4, the splash screen comes up for a few seconds and runs through the typical Adobe "loading fonts, configuring crap, etc" stuff, making it considerably slower than on my Intel iMac.