IE 9 is a complete turd for me. I heard they were going to focus on speed and decluttering the UI. I was eager to give it a try as I have no great allegiance, I just want something fast and not filled with useless toolbars I can't get rid of. I haven't HATED other versions of IE in the past, but I've always ended up using FF or Opera and now Chrome just because they were that much better (and to me, Chrome is MUCH faster than all the other bloated stuff).
Anyway, I still use IE9 just for one gmail based account as I have two I need open at all times. It's comical how bloated and slow and annoying it is for this. I'd also say the UI is ugly. After taking forever to load up and go to web pages, the browser keeps asking me if I want to go through my plugins to remove them and speed them up (which I did). Still slow. I am a heavy keyboard shortcut user as I hate using the mouse to scroll or navigate back through pages and stuff. I use the arrow keys to scroll up and down through my list of emails. I press it a few times to go down ... and it takes like 1 second to process each key. It's comically slow, like being on a 486 or something. Press down 5 times, step back, and watch it grind the screen down for 5 seconds. Geez. On the other side I always have like 20 tabs open in Chrome and it's amazing how well it always performs. I never had these horrid performance problems with IE8 either.
So yes, I think if you want to keep using a turd like IE9 I think you might not be on the smarter side, but more likely it's just computer illiterate people not knowing any better (because they aren't smart enough to be computer literate?).