Not just that but it's abusing statistics.

StatCounter attempts to measure browsing volume, not people using a particular browser.

Net Applications attempts to measure people using a browser, so IE9's reported share is three times higher, around 9%.

As an analogy, take the toothpaste market with only two players. Lets say 30% of people use Colgate and 70% use Crest. But for some reason the first group uses more toothpaste, so 60% of toothpaste sold in the market is Colgate and 40% is Crest.

Now, which one has a higher "marketshare"? Crest or Colgate?

It's funny how everyone gets so confused about this.

Anyway, Net Applications is the more apt comparison here because she's attempting to compare people having a disability, not the amount of browsing done by such people.