Anonymous wrote:OP here, I meant more social than economic/work related. There is a close knit, "insider" feeling between say Potomac/NCS/Sidwell etc grads that I'm not sure you get at large public schools. Maybe also because there are reunions every five years and the alumni magazine, you tend to keep the connections. DC is a small town and you keep meeting people that know people you know, and having private school in common is an instant bond creator.
In some ways, I agree with you. My spouse went to local privates for elementary & h.s. and compared to many people I know people do tend to make more of an effort to keep in touch.
However, I wouldn't let this be the deciding factor. DC is a place that attracts a lot of new comers and people that are from here that didn't go to private school. You can definitely have a strong social circle without it.
So basically, if you think that there are academic/social benefits for the here and now, I would consider staying. If you think your kid would do well at your local public, that's something to consider.