dudes... think PERSONAL PC Market!
its true linux has and is gaining popularity.
but its still not at the point where you can recommend it as the OS of choice to say, ur grandmother or parents is it?!?
the answer is a simple no, unless they are fairly computer savy.
so in effect, the claim is true.
sure maybe something like 75% of ppl here might use it, but come on... walk into a local grocery store, or bank, and ask how many of those ppl use it.