Robin,
Two things to think about…
1. HDV is not like the other tape formats you’re used to, in that it does not have individual video frames, each with its own timecode stamp. Instead, HDV uses the stored data of approximately 15-frames, that is stored as a data chunk, and from that digital information, frames must be decoded, virtually on the fly.
2. Because of the calculations that are necessary each time the camera starts and stops, Apple was forced to create new clips at every code break in the first go around of FCP. So, getting the camera up to speed and having a few seconds of role-in time is critical. Supposedly, Apple has either done something about this already, or will be doing somthing soon.
Hope this helps…
DRW