I smell a bet. :-)
*edit-I'll take it easy on you because you're older than me. From the FAQs.........
When playing with other players, the green speed will default to the green speed for the highest-tiered player in the group. For example, if two Amateurs and one Pro player are playing in a group, the green speed will be "Fast" based on the Pro player default speed.
(I coulda taken you for some Callys!) ;-)