This information probably doesn't surprise anyone anymore, but the release does OS X Mountain Lion the traffic supported by Apple's servers increased up to 6 times, and in the graph above you have the presentation best the whole situation. Considering that the installation package of the operating system has no less than 4 GB, it was normal for the traffic to increase, but the numbers are enormous and they put into perspective the power of the data centers that Apple has at its disposal at the moment . Even so, many people had big problems downloading the installation package.
Normally, Apple's servers support about 46 million daily downloads, but yesterday the number of downloads was much higher, but don't think that users have purchased several tens of millions of copies of OS X Mountain Lion. On Monday, Apple should announce how many copies it sold, and I estimate that between 2-4 million copies were sold in the first weekend.
