I could be wrong, but from what I understand about Pancreatic cancer is that there are no real symptoms. By the time you find out you have it, there is not much that they can do for you because it is too far along. And yes, the survival rate is pretty miniscule and the length of life remaining is rarely over a year or two, with most people having much less time.
I used to be invested in a Pharmaceutical research firm called Lorus which was working on a drug called Virulizin. Apparently, it showed some promised of increased lifespan from an average of 6 months to 8-9 months. The last I heard, it was declined by the FDA due to poor findings in their stage III clinical trials. This was years ago, so I don't know if they ever managed to get back on track with Virulizin drug.
As to Mr. Swayze, he has entertained me for countless hours through his acting performances in such great films such as Dirty Dancing, Ghost, Point Break, Roadhouse, Youngblood, Red Dawn, and The Outsiders. He is a wonderful actor and it is an absolute shame what is happening to him. I sincerely hope that he'll be able to beat it, but if not, I hope he does not suffer too much, and I wish him a pain free departure from this world.