Yes. But not necessarily in any bad way.
At my new job, there's lots of joking around. Occasionally age-related too. I'm the oldest in my team. Twice the age of the youngest.
One day the thought struck me that some my age might be bothered by something like that, and I realized that I really, totally, am in no way whatsoever bothered by my age.
Which is fortunate, as working in the ever changing field of software-heavy development, there's plenty of opportunity for the odd "when I was your age..." while shaking an imaginary cane.
Sure, I'm not too keen on some of the inevitable, physical side effects of age I'm starting to get hit by, but as long as I can run a half marathon any time I like, I can't really complain.
Ask again when death is just around the corner.
honglath: My lower back decided for me that yes, i am old.
Mine started telling me that in my late teens. That's why I have to keep generally fit and exercise several times every week. Otherwise my back will punish me.