I was able to take some more contrast measurements after moving my pj back for the longest throw. With the iris off, the contrast improved to 6200:1 and 24700:1 with the iris on. I took a quick modified ANSI and got 385:1. I don't have the perfect setup for ANSI measurements and I wouldn't be suprised if other reviewers get better numbers. These are with a calibrated theater black 1 setting. In dynamic, I got 7800:1 iris off and 39200:1 iris on in high speed mode. Dynamic mode is about 2.5 times brighter than TB1.
I spent a lot of time looking at the FI settings using all different resolutions and timings I could send from my Edge. My reference scenes were the beginning of King Kong, especially the intro universal logo and the scene after the zoo which shows a guy against a shed and a few scenes later horizontally pans showing the back of a girl sitting on the ground with a light sweater on. The Low setting shows stuttering with the logo, the guys face, and across the girl's back. Normal and High are smooth and do not stutter. All resolutions behave like this except 1080p24. This shows additional stuttering on all settings, so do not use this res if using the FI.
In the next chapter where the guy sneezes in the dressing room, the Low setting looks ok except for the occasional stutters. Normal and High produce artifacts with the wrinkles on the guy's forhead. Bottom line, 1080p24 always stutters. Low produces stuttering with all resolutions. Normal and High produce artifacts with quickly moving material or complicated scenes.
I looked at King Kong, Cars, Transformers, and other material. I thought the FI Normal setting for the most part worked well with King Kong and Cars, but definitely had issues with the fast moving parts of Transformers. Cars looked three dimensional with the FI on. I think this will work well with animation. The scene in King Kong where the boat leaves the harbor at night and there is a horizontal pan across the harbor will make your jaw drop with FI on normal and the black levels of the 6500UB.
I also checked the 4:4 setting with 1080p24 with the reference scenes and seemed to work well at reducing judder. I didn't notice any issues with this setting. With my pj, the 4:4 setting only shows up on the menu with 1080p24 and 1080i60. It's grayed out with 1080p60.
I think with film, there is not enough information for the FI to calculate all the vectors properly and gets tripped up easily. Maybe the algorithms can be improved. We are used to only having 24 frames for film, so this gives the picture on non-reality look. Once you turn on the FI, it looks like you are there watching the actors being filmed instead of a movie. I plan on using it mainly for tv shows, sports, animation, and maybe a few slow moving movies. BTW, doesn't seem to have as much issue with video probably due to the higher frame rates and it already having a reality look, really is much more subtle. Hopefully, there will be an update to improve this and fix the long handshaking issues. Use the Normal mode and avoid 1080p24 to get the best picture. Hope this helps people trying to figure this thing out. Of course, YMMV.