Legacy F1 Drivers - something to offer in their 40s?

[darcym]

Do you think recently retired, or about to retire F1 drivers are a good catch for growing teams ?

People like Coulthard/Truli/Rubens/Schumacher (just examples)

Mercedes obvsiouly believe Schumacher has something to offer in terms of race ability/marketing/development

Same for Williams - although less on the marketing if the rumours are to be believed.

they may have lost a 10th (or may not) but in terms of development and building a team they seem quite invaluable for the up and comings, such as Virgin, Lotus, Sauber, Force India etc......

I see a lot of these teams with two younger drivers with no / little F1 experience, even people like Sutil who have been in F1 for a good few years now, have never had an experienced hand to pick up the good habits from, see how they behave etc.

Are these teams missing out ?(I know money counts for a lot)