Here's a few threads on it over at Pangea forums:

This one is very long, but a great read. I'd highly recommend to anyone to read through it all. Some of the posts go off tangent, but good stuff non-less.
http://www.pangeareptile.com/forums/...ply-and-Demand

Here's another
http://www.pangeareptile.com/forums/...499#post468499