How many of you can RE now, but working because of children at home?

[yakers]

There was a great topic "How many of you can RE now, but are saving to raise your std of living?" which had some posters with the issue of planning retirement or jumping into retirement with children still at home. We have one son still at home a junior in high school. Technically I could retire but I want to get a bettr sense of his college prospects and costs. My wife is retiring in a few weeks so it will be interesting to see how that goes.
I just wondered if anyone who is retirement elligible has put it off because of children at home and what criteria you would use to retire before your kids are out of school?
It could also depend on your kids. Our older boy went to a junior college and then left home and worked part time for a *long* time before getting his BA and MA. But our contribution was not more than state school tutition, which we were happy to contribute. Younger son is not as certain. He is doing well grade wise in a good high school and will be taking the SAT next month but he generally doesn't test well. Fortunately he is very dilligent and that will probably prove more important in life. But we are in a different place, it seems strange to send a kid off to college and then pack up and travel around the world. Oh well, at least we're waiting until he goes off to school.