"What's especially interesting is the fact that Mozilla is picking up two out of three browser users that Microsoft surrenders."
I realize this was written with the intent of saying, "What a great victory for our hero, Mozilla!"
But let's look at the numbers...
Browser share for November 2008 per w3schools:
So, non Microsoft leaves us with 53.4% of the market... Meaning Firefox already commands 80%+ of the non Microsoft share.
Gaining two out of every three - 67% of users quitting Microsoft - when it already has 80%+ of the non Microsoft share - implies its popularity is dropping not gaining amongst non Microsoft users.
Safari's stayed pretty constant for the last few months - as has Firefox, crawling up at a very slow rate. Chrome jumped from 0 to 3% pretty much immediately but has then barely moved in three months. Opera has actually gained proportionally the quickest (2% to 2.3% is a 15% improvement for them in three months).
So, I realize it was intended as a "Yay Firefox" claim - but, if you look deeper at the numbers - less of the new Anti-MS crowd are adopting it than have in the past.