Whatever we might wish were the realities, the real world is what it is. Both Linux and Mac users are such vocal minorities that the size of their user bases are often over estimated. I manage several websites at a major university and part of my job is to monitor traffic. Our visitors include a large majority of .edu and .gov origins where both systems are more popular than in the general public. Here is the statistics for last month for 132,889 unique visitors ( a pretty fair sample).
As you can see 90% use some version of Windows, 5% use a Mac OS and only .5% are using Linux. Likewise despite what you might believe from the publicity 82% are using Internet Explorer to only 10% are using Firefox. These percentages are just about the same month after month.
