Bad work experience, new job environment - fitting in?

I just left a god aweful company that has been nearing the end for the past two years (finally went into bankruptcy last month) so I have been exposed to really low morale for a pretty long duration ontop of being thrown to the sharks with some really high-risk/high visibility projects, so as you can imagine, my whole perception of work is really scewed. I have an offer with a new, much better, much healthier company and I'm a little nervous about how quickly I'll adapt. I'm pretty used to being just used and abused and beat down by work, so I'm just wondering if anyone else has cured a similar "Stockholm Syndrome." How long did it take for you to return to normal?