Last night, my daughter was on Sporicle.com [I thinks] and was playing a game on it.
When she tried to type, it was VERY slow, sometimes taking up to a MINUTE to show the 5 chars that she typed. Dragging the window back to the primary screen, it's fine. Watching a DVD/BR, it's fine.
I have a second kb/mouse connected, didn't try it with the secondary equipment. It's for running XP in a VM.
I also see occasional pauses of the computer on a semi-regular basis.