Ask HN: Does Google's “Fetch and Render” mean that they support JavaScript now?

http://googlewebmastercentral.blogspot.com/2014/05/rendering-pages-with-fetch-as-google.html

I tested "Fetch" and "Fetch and Render" with "Fetch" returning the raw HTML, and "Fetch and Render" displaying exactly how it would in a browser.

Should I assume that Google can properly index Javascript now, or is that still in the territory of "just because they can, doesn't mean they will"?