Ours has just learned stairs after 2 years. We were trying for a while and progressing slowly. Then we were babysitting for another greyhound that could do stairs and it suddenly became much more important to our guy when everyone was upstairs but him. Then he figured it out for himself in about a day. Still have to lift his hind end up into the car though.

I agree about them being very well socialized w/ other dogs. I do notice that they are more interested in other greyhounds than other dogs.