From their TypeScript blog post re: path to 1.0:

"There are now dozens of large applications written by teams in Microsoft, including Bing, Xbox, TFS, So.cl, as well as in projects such as Adobe Digital Publishing Suite for Windows 8.1, Zud.io, Away3D, and Turbulenz."

I think they've been pretty serious about it from the start due to the design decisions in Metro.

That's pretty impressive. Why isn't Google releasing info about all of their projects that are using Dart?

Because there isn't any? :)

Anders is in charge of TypeScript. That alone should have been enough.