Yes, that may be, but what are the advantages of tabbed browsing vs multiple IE windows? There's no advantage if it's just different keystrokes. I'm sure I'm missing something.

You can only see one page at a time whether you've tabs or multiple windows. Yes, you can have other tabs loading in the background while you read the current page, but you can do the same with multiple browser windows. Do you save computer resource if you run 1 instance of FF vs multiple instances of IE?

Performance-wise, I find FF average out to be the same as IE. Some sites are better with IE, some with FF. I agree with the point of the lack of standards in IE, (that gives us a big headache at our work). But performance on a page-by-page basis isn't what we're talking about.

I've a big screen at high resolution, so I can have 2 browser windows running side by side, I hop across to each one. Also, I like my computer to be lean and without programs that are not must-have's. Therefore, I just stick with IE - it does what I need. (I suspect this is the kind of attitude Microsoft like customers to have - too lazy to move to something else, but that's a separate discussion altogether...)