Awesome news! That's more copies than CoD or WoW expansions sold in the same time, impressive. I for one am loving ML and it's new features, and thus far have not run into any issues with software or kexts*, everything just works. And fast too!
For those who claim they see no difference between 10.7.X and 10.8, you just don't know where to look. Like every incremental OS version update, going back to 10.1, the changes are subtle. Everything "looks" the same; To be honest, everything has basically looked the same since Tiger. Apple claims over X-hundred new features with every new release. We all know they are there, otherwise we wouldn't bother updating from 10.5.8, and ML is no different.
* Had to do the 6800 install/post fix. As a result, during post when it would hang after macx_swapon (before the fix), now it hangs for 25 seconds (no disk activity) before the desktop appears. For a SSD, that's poo! 10.7.4 loads in literally 2 seconds... Apple dropped the ball on this one, and I suspect the new iMacs and Mac Pros are going to include nVidia 600 series, as the new cards run OOB. ....