Hybrid vigor should allow them to grow faster. But unless a side by side test in cages was done, we will never know.

I don't think GSF would work as well as either HBG or BG because they don't get as large.

www.hoosierpondpros.com

[Linked Image from lh6.ggpht.com]
http://www.pondboss.com/subscribe.asp?c=4
3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).