This may seem old school but I have been doing a little work on exactly what an entrepreneur that is a target for ATDC looks like. So happens that there was a bit of a online debate going on about the subject. I challenged Paul Kedrosky to come up with some numbers to back his ascertain that thinking of entrepreneurs as only young was silly. He did, and it is of great help.
Over 50% of technology entrepreneurs are between the ages of 35 and 54 according to the 2006 Global Entrepreneurship Monitor.