I have been doing a little research. It appears Portsmouth has not been updated since at least 2010.

An interesting thread:
http://www.catsailor.com/forums/ubbthreads.php?ubb=showflat&Number=209310&page=1

All of the points are still valid today. It is also interesting to see the personal viewpoints then and now. Without Portsmouth being updated before next years season starts, it is hard to justify using a system that has not been updated in over 5 years. US Sailing either needs to update Portsmouth or switch to a different system.