In article ,
(Tom Seim) wrote:

Contest are won
out on course, not on the final glide. An optimized task will have you
coming in at best glide speed. If you aren't aware of this I would
suggest reading Moffet's book "Winning on the Wind", it could correct
some misconceptions that you appear to have.

That's only true if your last climb rate was 0 fpm, or you hit cloudbase
with just barely enough height to get home. If your "last thermal" is
high enough and not too far from home then you should keep climbing
until you can set a Macready number for the final glide equal to your
climb rate at the point you leave the thermal. So if your last thermal
is giving you 500 fpm then it makes complete sense to come home at Mc=5,
if you can make it all the way to the finish line at that speed.

-- Bruce