Dart team member here. Google is using Dart heavily internally. Many, many significant apps (think Adwords, Adsense, Google Fiber, and a pile more) are shipping

Dart team member here. Google is using Dart heavily internally. Many, many significant apps (think Adwords, Adsense, Google Fiber, and a pile more) are shipping on AngularDart 2.0 today. It's not accurate to say that AngularDart exists first and foremost to meet the needs of one internal team - it exists to provide a great framework for apps of this type (significant, complex web apps). We think we're making pretty awesome progress here - we've been able to dramatically increase velocity since the source split (a couple of months ago), and have made really large improvements already in application performance and in shrinking the size of the compiled JS for AngularDart apps.