What I am saying is as most people use PCs, and the average non-geek Windoze user will use whatever browser comes with their computer, which is IE.
So, websites will be tested with IE, as its very popular.
That still has no effect on IE's standards support, which, while better than IE6, is still *****. All you end up with is a bunch of non-standards-compliant websites botched to work properly on IE - which is just about the worst possible scenario.
MS should do us all a favour and just use Gecko or WebKit for IE and be done with it.