So how quickly will IE7 be adopted?

Apparently IE7 will be distrbuted as part of Windows Update, so I wonder how quickly it will replace IE6? Looking at the stats for the Random Pub Finder, of the 85% who used Internet Explorer to visit this month, 4% were using IE7. I'm guessing it will take about 2 months for the majority of IE users to have switched. Lets wait and see...