Yep, I'm one of the people still using IE6 at home. Have to switch one of these days, but when I tried IE7 it caused all sorts of problems for my computer, and I had to undo it about two days later. Maybe I'll have to try something else.
Just worth mentioning that I don't recall ever seeing a school computer or a computer in a PC bang in Korea that used anything other than IE6, so that's a reason for your skewed stats right there.
My Korean friend noted that IE7 caused problems. Word probably got around so many Koreans probably didn't upgrade.
At home, I use Firefox with Linux Mint as my operating system. I find that if I run firefox in the following
Linux Mint) Much of my computer resources seem to be dedicated to firefox.
Windows) Maybe 30% of my computer resources seem to be dedicated to firefox. The majority of the rest seems to be dedicated to running virus or software updates. At school, the virus updater was so bad as far as resources that it made the Internet completely unusable for the majority of the day. So I couldn't load videos to watch in class, or show pictures to explain words.
Occasionally, the updater in Windows will nag me about rebooting. Doesn't seem to care that I am in the middle of doing something else, like showing something in the middle of a class.
I joke with friends that in the future, companies that still bother with Windows will give employees a 4 hour break time every day so that they can go do something else while Windows updates.