Honestly, I can't picture many show type Labs hunting. They're too short and stocky. Sure, they may have some instinct, but if you ever got a chance to watch both in action you'd see right away that the field Lab excels in the field as far as instinct, stamina, energy, etc. goes. Show dogs of a lot of breeds cannot do the job they were originally bred to do as well as they could've before hand. When judges are judging a dog in the ring, they are only looking at appearances which means that more and more dogs with lack of instinct are being bred. When I get my Toller, I certainly don't want one strictly bred for show. They're still a pretty versatile breed, but now that they AKC has recognized them they're becoming more popular and already you can notice differences between the true working Tollers and the show Tollers. They may be minor, but they're there. I want a high drive, high energy, athletic dog. Something which a lot of show dogs are not. Working dogs (in the sporting group in particular), in general, are of higher trainability as they want to work to please. They also have a lot more stamina, are built more athletically, have tons more energy, etc. While show dogs are more laid back and lack work ethic. Of course there are exceptions though. Are working breeders truly breeding out of standard? Not at all, in my opinion. As far as appearances go, what in your opinion should a Lab look like (since that is the breed originally mentioned in the thread)? I believe a Labrador should be muscular, athletic looking, be somewhat tall (for running speed), etc. They should look like a dog who could go out in the field and hunt for hours on end. They should not, in my opinion, look like the AKC or CanKC says they should. Show Labs are short, stocky, semi-overweight (a lot of show Labs are the latter to show more 'substance'), and overall, lack the appearance of a true working animal. I hope that all made sense, and please remember, this is all just my opinion and I hope I didn't offend anyone (though I don't see how I could've).
I hope to show my dogs in conformation one day, so I'm not saying any of the above to offend/anger show people. However, my Tollers will also be tested to prove whether or not they can do what they're supposed to be able to do and if they can't, that dog won't ever be bred if I can have anything to do with it.