Yay, maybe 20% faster than the existing Atoms? According to the Intel Atom wikipedia page, each core of the Atom processors today are 50% the speed of a Pentium M, clock for clock!
They are soo sloooooow. My aunt has a 1.6GHZ Atom netbook and just surfing the web is sometimes dog slow. I upgraded the hard drive to a Scorpio Black 750GB drive, that helped, but still dog slow.