Does this impact your opinion at all?
http://news.dartlang.org/2013/12/ecma-forms-tc52-for-dart-st...
Yep, but that doesn't mean much.
You can take a look at :
http://www.infoworld.com/article/2608454/web-development/goo...
https://en.wikipedia.org/wiki/Dart_%28programming_language%2...
"Google is changing the monopoly of JavaScript by implementing the Dart VM in their own browser."
As far as I know community doesn't care much about Dart [1] and they are concentrating on further enhancement on ECMAScript.
[1] : http://en.wikipedia.org/wiki/Dart_%28programming_language%29...