I agree entirely with this post. Sure, coding a site to work in IE6 is a pain in the ass, especially when working with JavaScript-powered elements on a site that need to work in every browser. I've always followed the Yahoo graded browser support (http://yuilibrary.com/yui/docs/tutorials/gbs/) baseline when building new sites and have even moved it over to personal projects.
I would chalk it up to experience with older browsers, but I've worked with students fresh out of university that have had to pick up projects that have IE6 as a requirement, and they've coped just fine. Many of the developers that are so up-in-arms over cross-browser support are largely new developers or aren't that good at their job. They'll only be versed in what their favourite blogs will preach, they'll use any jQuery plugin or JS polyfill they think sounds good to make their site better, they've never used the profiler within Firebug and never check the size of their web pages. I spend a lot of time on /r/web_design on Reddit and it is not uncommon to see users posting "great websites" that use Modernizr to "make their sites cross-browser" and weigh in around the 5-10MB mark for something as simple as a basic home page. A large number of front-end developers probably wouldn't last a month at your average agency or development team for a large website.
We all want IE6 and to an extent IE7 to die a horrible death, and Microsoft have clearly done their best to try and get people off a dead platform and onto a new OS. However, we're not talking about rocket science, we're talking about rejigging some code or learning the nuances of each browser your users use. Quoting the latest StatCounter figures (or whatever backs up your argument) to provide an argument for ditching old browsers will have battle-hardened developers laugh in your face, because they aren't your users!
If you're making an application then you have a case for not supporting legacy browsers, but if you're complaining that setting up your crappy WordPress-powered site is too hard in IE6 then either shut up or find alternative employment.