Interesting thread! After giving this some more thought, yes they certainly are mis-judged alot. They are also taken for granted because they are so numerous-- so naturally are not carefully studied as much as, for example, the kudu, one of the most coveted of the PG. They are small to begin with, with long legs and that may emphasize their horns somewhat. Take a small, long legged, thin framed antelope like an impala and add a squared off (I call it boxed looking) set of horns and yep... room for ground shrinkage. The better ones do tend to have that boxed look but it takes more than that for adding trophy length. I think the important part of the horn for adding length is the portion after the horn turns upward. I have learned to concentrate at that part of the horn and compare it to face length when judging them. If that more or less vertical part of the horn looks proportionally long, then chances are good the overall trophy length is good.