Here's how to unblock Time Warner's Throttle to get around Youtube lag / fix laggy buffering.
PC:
Go to start, type in CMD and right click and open as administrator, then type
"netsh advfirewall firewall add rule name="YoutubeHack" dir=in action=block remoteip=173.194.55.0/24,206.111.0.0/16 enable=yes
To remove this rule, type:
"netsh advfirewall firewall delete rule name="YoutubeHack"
For Macs:
sudo ipfw add reject src-ip 173.194.55.0/24 in
sudo ipfw add reject src-ip 206.111.0.0/16 in
To check if they were added:
sudo ipfw list