Yeah, many times smaller hatchlings do catch up, and can even grow to become the largest ones, but all this depends on so many darn variables, it's virtually impossible to say. And of course on the other side of the coin, the larger hatchlings can stay growing at an even clip and remain larger into adulthood as well. There just isn't any absolutes when it comes to snakes, or any animal for that matter, it just depends on too many things.
I have an Outer Banks female that used to be the tiny nine gram runt when newly hatched, and now she is the big monster of the 1.2 trio I have. All are extremely healthy and robust, but she really took off early, and has remained so.
Males though, are generally substantially larger than females in most(maybe all) of the getula complex. This seems to be especially so with brooksi and Easterns.
~Doug
pic taken exactly one year ago

Pic taken a couple months ago

~Doug
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"a snake in the grass is a GOOD thing" 