Well, even if IE will load pages faster, i still won't use it for navigating.
I'm a "Firefox all the way" guy and simply love surfing with it.
However, i'm using the "IE tabs" plug-in to view pages as a guest or simply to see how it looks in IE.
Just a click from seeing my site in a different browser
If only IE had the features that FF has... and if it were less annoying...
It's simply not nice.
Thumbs up for it's speed, thumbs down for everything else.
P.S.: I use IE 6.0 for designs.