I make under $40k. don't care who knows but I do pretty well with it really, I think anyway, own a home, just bought another brand new car, every TV in the house is over 32", laptops, nice gaming rig, ipad, 2 consoles, buy any game i want and just purchased a 680gtx directcu 2 should be here tomorrow I hope. heck i'm happy in life.
But I have a credit score of over 800 too so that helps. I always tell younger guys to work on that credit as soon as you turn 18.
$39k here and I feel kind of the same. If you live alone and don't have an expensive hobbies, it's certainly enough to live a decent life. It's hard to really save any large sums of money though. This month I managed to put away about $450 into the savings account which is above average for me.
Also I feel that with my level of education I could do better. But it's OK for the first proper job in my life.