George :

I like to take my fly gear and catch large BG and RES (RES with a slow sinking fly) when it starts to warm in the spring. \:\) \:D

Most pond mgt. manuals give the reasons or should I say the very limited situations where HBG are a good choice. Here is one link.

http://msucares.com/pubs/publications/p1893.htm

We don't have that situation yet so we don't use them. While I often caution folks on the matter they can be the right tool in the proper circumstance. One thing every study and report on the matter I have seen states is that HBG are more aggressive than BG and some say more than either parental species. That IMO is the hybrid vigor part of HBG and the assertions of size/growth rate is much overstated.

Todd I am still looking for your requested info.