I have checked with a route planner coming from M90 J9 via Kincardine Bridge/Down A9 and across Forth Road Bridge.
Via KB = 56miles 1hr 21minutes
Via FRB = 62 miles 1hr 12minutes
Via A9= 56miles 1hr 21minutes
The point of using the Forth Road Bridge as a meeting point was so that if anyone comes down from further North they can easily find us. Its also the fastest route from Fife where the thread topic originally started.