Dave I don't think he means 30p slowed down twice, I think he means 60pHD, yes?
My answer - no clue. I never needed it when I edited in CS3, and even though I did have shots from the HD Hero GoPro, I tossed them in the timeline with my SD DVX footage because they were going together and I didn't care.
OP: "If you suddenly skied off a huge fuckin cliff and you only had time to throw one last trick before you died, what would it be?"
Malcolm: "id probably just flail my self to death"
"If the overall quality of your film depends on what you shot it on, you aren't ready to make a film." - Barry Green