We have to go and do the counseling thing because we're using a known donor. DH, donor and I agree on everything about everything. DH and I disagree on one point however, and she's going to ask us about it.
So here's an informal poll, of sorts.
How old do you think the (hypothetical) child(ren) should be before they are told about how they were conceived?
(In case anyone is interested, I say 15; DH says 10.)
Edit/Update: So after a long long talk, we have landed firmly in the don't tell camp. Thanks everyone for you advice and opinions.
I'm leaving this here instead of deleting it, because it's a valid discussion with a lot of good ideas, and it might be helpful to someone in the future.