The most honest answer is that neither mean anything nor are they any indication they will amount to anything.

Percentages:

The previous owner of this board showed a near 90% success rate. That is impressive and sounds even more impressive. But it was not 90% of all dogs produced but 90% of all dogs matched showed game. Which is still great but if you just vet the dogs that someone shows, lots of people have high percentages of game dogs if the math starts at the show.

Breeder statistics:

These can be inflated and fluffed as well. If the breeder has 10 pups and 6 make it to the show and2 are game plugs and 2 are curs. That is easy math. Then factor i the breeder that blames the new owner for ruining his dog. So now we are 6 of 8 instead of 6 of 10. A 15% swing in percentage points on subjective or selective perception.

What is the initial mission statement? If the goal is to make winners and the litter is chock full of game plugs who will scratch but can't win, is that a failure? Yes, if you were after match winning dogs. It is a no, if that family of game dogs goes on to produce match wining dogs.

And if the goal is to create paperwork that suggests there will be winners and producers down the road that is a different ball game together.

So the most scientific terminology I can use is that if you leave the breeder's yard with the 'warm fuzzies' that is about the best you can do. Then time, and only time, will answer the rest of the questions.

EWO