We are solidly in the 100K category and I would describe us as affluent (which is a word I hate only because typing it out makes me think of effluence which is gross.
We are lucky, lucky, lucky, lucky, lucky!!!!!! We did nothing to deserve it and are enjoying the hell out of it. It allows me to stay home and dh to have a career that starts out slow and takes a looooong time to get going. We also do try to spread it around as much as possible. We give a lot to charity (a very big deal in both mine and dh's family) and we help out friends as needed and try to treat people to little luxuries they might not otherwise be able to afford (dinner out, concert tickets, gift certificates etc.)
Our money does go much, much farther in Vermont than it would in Orange County or Westchester or Manhattan. It's one of the reasons we live here.
I have noticed that spending grows with income. It's like helium in a balloon. It fills the space it has, and almost everyone I know who has a bump in income eventually winds up having the same money problems they had in the previous income bracket. My point being that whether you make 20K or 120K, if the third week of the month rolls around and you are out of money because your bills were high and something unexpected happened, it terriying either way.
We have travelled a lot, and poor in the states IS very different from poor in other countries. But that doesn't mean it doesn't suck.
Again, I'm rambling. We are lucky and we know it and we are grateful and we say that every single day.