re: Free streaming sites compatible with Chromecast?

i have found the services designed for chromecast like netflix, youtube and hulu work flawlessly. I just can't get the damn cast from the chrome browser to work without massive lag and choppiness. I have comcast highspeed and I know comcast blows. Maybe google fiber will challenge them soon. for $35, chromecast does what it says it will and I like being able to go from one room to the next since i have chromecast on multiple tvs.