This test was ran as plain vanilla, no addons - it's exactly as one would expect. Shitty IE is forced to come up to par with a noscript Firefox.
MS was forced to add this type of detection built in with their Smartfilter, application reputation, and others types of prevention functionality because of their dwindling reputation. Essentially Microsoft's homemade 'add-ons' for their crap proprietary browser.
The things that MS now built into IE 9 is no different than add-ons any savvy tech automatically load into Firefox. I don't know anyone who uses Firefox without Noscript, and nothing gets through - ever.
Maybe it'll fool some people to run their bloatware, I'm sure MS hopes so.