I know some breeders will charge you pet price or lower price until pup grows up and is show quality. From what I observed, breeders that have been doing it for few years and have developed their line are pretty much right on target what pup is going to look like when grown up. I am sure some surprises do happen...am sure that height is major reason why puppies end up at pet/ performance houses...
I do have some feelings about it as it seems there is some atittude- oh, yeah, well, not good for show dog well, will be good for performance... I think performance dogs are NOT show rejects and should be merited on their own!
Jennifer once told me that height was the biggest disqualification for shelties in the ring.

About shelties and performance. I don't know. Jennifer, however, does have performance only dogs, and she does do performance events for her conformation dogs. She also from time to time helps with collie rescue.
My reasoning would be that the performance events conflict with the conformation events. The Texarkana Kennel Club doesn't even offer agility at their local competition. It's only comformation, rally, and obedience. Schedule conflict is something Jennifer is always having a problem with.
Ellie, one of Jennifer's show girls, was entered into rally yesterday, and did pretty good for her first try. So I hear. I was at work.

I keep debating back and forth about building/buying a regulation obedience jump just to see how badly that goes.
There are jumps in obedience, but speed and jumping are not the main focus in obedience.
I mean seriously. That's not saying that people who only do conformation are bad people, and that does not mean that people who do only performance are bad people. But how can you say this dog would be good for agility or this dog would do wonderful in obedience if you've never personally done them yourself? How can you know what it takes and what qualities to look for?
). It's a whole other ball game though when a dog is sold from a breeder under the assumption that a dog would be good at an event.
Jennifer did that this weekend - she did rally instead of conformation (but Jennifer does like agility, also!).