I am testing it a bit...
Befor 10.3 Youtube lagged a bit the first sec.
Now it starts smooth, but the sound seems to not fit the video.
A livestream on own3d.tv laggs like hell. We need the Archos acceleration.
EDIT: U can change now the quality of a video on youtube. And it seems alot faster than 10.2. The sound bug i had was only temporay