Hehe, what a wonderful topic
I remember having heated discussions with ADB some years back...
Here's a 58" bamboo backed ipe, drawing about 80# @ 27". I'd say it's a flatbow. It even has a very long non-bending handle, and long tip sections which bend nearly nothing. It's about 1,5" wide at the fades, and followed the string about an inch. It even shot 370 meters once.
Make the handle shorter, convert the limbs to pyramid design, and it would easily have drawn 100#.