[danijel]

Here's my reality - theaters in Belgrade, Serbia (and I've discussed this with ALL the theater managers, and visited the projection booths many times) all gravitate around 5 to 5.5. Lowest I've seen is 4.5, and there is one that was 6.5 (wow!).
So, when I'm mixing primarily for the domestic exploitation, I do it at 5.5. That is around 6dB lower then 7, and the dialog on average measures -25 LKFS, only two dB off compared to my TV mixes.
On the other hand, art-house films, whose main target are festivals of better reputation, I do at 6.5. Any good festival will have a Dolby representative come and set all the rooms a couple of days before the festival. But every time I enter the projection booth, they're at 6.5! I will not say which festivals are those, because I suspect the Dolby people themselves are skewing the '7' standard in an effort to be realistic....