All I can say is the presentation I saw left a lot to be desired. It was a realD presentation. I also thought it was very dark and the slight green tint the glasses have also added to the dreadful picture.
I was honestly very disappointed. I'm not TPM's biggest fan but was curious to see it 3d but hey ho, as you say it could be our local cinema's fault but I wont be going to see it again to compare.