I also found this thread:
http://www.camaro5.com/forums/showthread.php?t=251422&page=7
Post #167 shows that pulling the trunk as well is in fact recommended during a fuse pull for this reason even though it's a ZL1 area.
I think I might go try it again with the trunk fuse pull and try yet another test next weekend. I went driving today and I got 23 mpg as well as +/-1 on hills. Highway and cruise control of course though when possible were used.
Prior to the first fuse pull I couldn't get over 20 mpg. I am going to go with the fact that I've probably been getting better quality gas as well as the fuse pull both have to have helped.
I have noticed it's much easier to shift and be in traffic, as I said somewhere else... Even if it's subconscious, that's fine by me.