it probably 'stuttered' 3-4 times.

so...during game of thrones, no. for something not as important, it's ok.

that said, I read a reccomendation to play prime in Flash before using chromecast (there's a setting on Amazon). I'm not sure what WEE uses - probably silverlight.

So Prime may run better with chromecast.

It's a pretty dumb thing to not have support for.