My incredibly complex hypothesis has always been - Their eggs are BIG. Granted, these aren't exactly Corn Snakes crapping out softballs, but... IF there is any data, I'd like to see egg size vs. species size. I'd venture a guess that Dry's have one of the most skewed ratios in the snake world. I'm sure it doesn't help that they're pretty much coated with sandpaper - ouch.

Dale