An 18 Sq is a totally different animal -- it has a fine bow entry and long waterline. The Wave bow entry looks more like a beer can and is only 13' long. By depressing the leeward hull too much all you are doing is adding more bad bow entry.
Basically, it is a balancing act of keeping the bows out of the water, and at the same time keep the sterns leaving the water clean.., almost impossible task.

Totally agree on the speed testing.