[adamkiss]

Okay, then it's the javascript. But what javascript (running jQuery+UI) providing async script loading and few UI elements, can cost $100.000 to debug on IE8+, for instance?

I'm not saying there [on the 4ormat] isn't technical solution that could be this expensive to debug on IE, but none is visible on 4ormat page and nothing less obvious is mentioned in the article, thus diminishing article's credibility;

You know, instead of something awesome like 'we implemented geolocation, offline aps and 20-years-too-soon-UI, so we ditched IE', they are doing 'Hurr Durr bad IE can cost up to totally out of my ass pulled $100.000'.