I can't wait to see this movie. I don't think the film maker would say they're using real SEALs if they didn't actually have them there, would be a lot of bad press. As Jim said, its purely entertainment. Nobody should be planning covert ops based off their tactics.
It's quite realistic to have SOF soldiers play themselves as characters in movies doing the job they would do for real. I highly doubt the sailors have long winded conversations, and most of the other speaking role are actors. Most SEALs would be very comfortable speaking scripted from memory in front of groups, and unlimited retakes and editing would erase any mistakes.
There are many different types of SEALs. The ones who would be the equivalent to our JTF2 ("SEAL Team Six") would not have their names (first, last, alias or otherwise) and faces plastered all over the movie screens for all eternity.
Other SEALS who make up the "teams" who would be equivalent to our CSOR, probably do not have quite the extensive secrecy, and would likely have been granted permission from the US DoD to be used.
The difference in skill and equipment would not be evident to anyone but those with intimate knowledge.
