Advanced gives a better picture, it is 72hz, it makes the image true to the 24p original, it also gives the films judder on moving objects...that is just how it is.
Smooth is 60hz...it makes the 24p look smoother, it is actually not as good, but yet some may interpret the reduction of judder, as a reduction in flicker.
Just set you darn tv the way you want it. If the 24p of a movie theatre bothers you, make it fakey and enable smooth. The judder goes away, it looks more fluid, but at he cost of picture vibrancy,(and realism to the original content)
As for the greyscale. I can spot the difference between a modified greyscale and one that is not. In my set with advanced on, if i change the greyscale, it DOES change.
Here is a tip.
Enable isf day/night modes as per control cal settings and watch it. If you don't like the 24p judder...well that is the owners problem, not the tvs.
As for proffessional opinion...advanced is best. All reviewers that pick the kuro as number 1 int he world tested in that mode.
Maybe 24p isn't for everyone...a 240hz sony might make one happier. The rest of us will stay the course with our 9gs.
Also note that just because it is in 60fps mode...doesn't mean it is in 60hz...it is 72hz with 60 fps. So all of this is about fps aka judder, not flicker or strobing. The cam corder is showing thing not unlike a timing light for strobe...you are interpreting the cam corder data all wrong. Toss the freaking cam corder away, and use you eyes. If you like smooth...you prefer less judder or 3:2 pulldown for fast moving scenes, vs. a 3:3 pulldown and 24p actual. End of story. Dnice knows this stuff...he is not getting involved likely because it is beyond hope to deal with this rediculous mess...itis a simple 2 sentence answer that he already gave. end of storey.