tdulger I disagree with this statement
But generally GPS and Drahthaars versatile dogs. So they can be adapted for every kind of upland game hunting easily. But they can never be an expert.
For one many GSP' s do indeed not only to excel in area' s of so called experts but have continually beaten them in their own game. I understand you may not have seen them in Turkey because of being isolated but look at NSTRA, AKC field trials, AKC hunt tests, NAVHDA. The saying jack of all trades and master of none is a saying and does not have merit to the GSP. The GSP in more than one occaision has proven itself as a master or in your words an expert.
Now in all fairness you have a different level of natural ability in each dog within a certain breed. You also have to factor in training, which can be an influence as well. In the end though to find a good hunting dog you probably can not get much better at finding one in the GSP breed. One of the reason is they still have a good base of breeding stock to choose from. Not saying one can not be found in other breeds it just takes a lot more to find it.