I am not sure how many father and son times are both Sub-3: I managed my first sub-3 with a time of 2h56 starting in VB and then waited for my son (Josh, age 14) to finish as he started in Group E. You can imagine the family anxiety when he said that he too had done a 2h56! So until the official results came out, we did not know who had "won". It landed up that my son beat me by a mere 30 seconds. Great day, a great ride, and a proud moment.