Agree with Smitty. Of course, your son will earn looks based on his talent level, not what yours was. It can certainly be a positive data point but interest has to come first. Once interest starts coming, there will be plenty of opportunity for that topic to enter the conversation, if it isn't already known. Some possible exceptions would be if you were an absolute stud/record holder, if you played at the school he is talking to, etc..
Yes, it is something that some coaches would be interested to know. The flip side is that it is more impressive (at least to me) if the player is humble about it/determined to earn on his own merits and it happens to come up much further down the road in the recruiting process.
Also, it can make for a great conversation topic once a player is in dialog with RC's. Sometimes, it is hard for young players to come up with fun topics like that to make those discussions more relaxed and enjoyable.