A user of the IMDb forums, lizze-sandy81, posted recently that she had seen Skyfall cut together as part of a test audience. This is not uncommon practice and the poster is clearly a Bond fan, having followed the production quite closely. Some points of note, if genuine, are that Skyfall is currently edited to an impressive length (after the short and ultimately bitter Quantum of Solace). The film is reportedly almost three hours long, with the Scottish scenes starting around 2 hours into the film.
The poster also makes nods to the fact that Ralph Fiennes’ office is dressed much like M’s in the early years and the relationship between Fiennes and his subordinates brings to mind the old M-Bond relationship.
The pre credit sequence is reportedly 20 odd minutes (rivalling The World Is Not Enough for length).
Finally the soundtrack has yet to be completed, so scores from old Bond films were used as filler and the OHMSS theme music played in place of the title track.
For some of the more subjective points, you can read the whole review here.