I have done a complete test between CS2 and CS3 using a clapper and capturing at different presets. There is actually about a second or two delay with CS3.
The delay would be in the audio not be in sync with the video. The delay happens playing either on the internal ppro monitor or on the intensity. The delay is about the same. I tested audio output on both cards, the Sound Blaster and Intensity. Both cards had the delay. I also tested the audio on a HDMI monitor using the Intesity card (audio send thru HDMI cable). The analog audio was being sent directly to the speakers (thru a mixer).
Everything worked perfectly using CS2. This includes audio being sent HDMI or thru the analog mixer.
Video is being sent to a HDMI and Component monitor on the Intensity card. Presets were also used that do not use the Intesity card. Both NTSC and HDV presets were tested.