I activated the VNC server (the one built-in to OS X, "Apple Remote Desktop" sharing item) on my wife's MacBook and then connected to it using Chicken of the VNC on my iMac, which is right on the next desk. Both computers are wired into my gigabit network. The performance is hideous. It's been a long time since I used any sort of VNC or remote desktop, but I know it wasn't this bad. I reduced the colors to Thousands in the client settings but it didn't help at all. The lag is awful. I'm not having speed problems with file transfers, so it's not my network. Any ideas?