I've always run my Sony Z1 with "Quick Rec" set on (in menu > others) because I'd hate to lose a clip by the camera not starting recording quickly enough. But using HDV Split I do get some messy .m2t clips when I capture. Either they're not split properly or the video stream is a little shorter than the corresponding audio stream. And actually in Vegas the messed up clips are read by the Main Concept mpeg2 codec, not the Sony one, and so they're much more sluggish on the timeline.
So other Sony HDV camera users, do you have Quick Rec on or off?
Those who run with Quick Rec off, how long delays do you get you press record? Has it ever cost you an important clip?
Those who run with Quick Rec on, do you ever get messy .m2t files when you capture?
cheers