Ah yes, true. I've always thaught of it as understandable that they focus on Visual Studio, but I too would much appriciate it if they would push that a bit less. I did try the free version of VS when I started with TS, but I didnt prefer it to webstorm, even though in some small details, the ts support may be slightly better.
There are a couple of links to editor syntax files and a link to WebStorm but they're a bit of an after thought.
I keep expecting the homepage update "any day now" but so far I've only really seen VS mentioned as a default environment.