Dunno how its there. Here, you should be happy if U can roll into 2-3 dogs about the same size with honest people, regardless style.
Allot of times it dont even help. Dog gets owned on the head by a good head dog prospect, now ur dog knows what it is to be owned on the head. lol. Also some dogs will never change style. Not to many real intelligent dogs out there. Other side, i have seen dogs on first roll fight like a fully "schooled" dog, mixing it up and adjusting to different situations. They just have it in them.