Not all handles are created equal. If the dog left the line on the way to an old fall or off into no-man's land and had to be handled to the bird, that performance doesn't compare to the dog that simply drives past a fall on the upwind side and has to be stopped and handled cleanly to the bird. The first dog showed me NO INDICATION that it knew where the mark was. It's all about the impact to the marking or perseverence scores, not the number of handles.
If you only have 8 marks in a Master test over 3 series (triple, double, triple) and 3 of them are go-birds, the other 5 are memory birds. At a minimum, I'd like to see a dog clearly remember 3 of those 5 and at least indicate some idea of the general area on the 4th one. If they need moderate help on one or maybe a quick handle on two, and all other work is satisfactory, I have no problem passing that dog. On the other hand, if the dog is totally clueless on two or more and requires significant assistance and the other marks were not real strong, as a judge, I have a decision to make.
Every situation is different. That's why we have judges. Some are better than others, but in the end, we shouldn't make excuses for our dogs. Just train them better and hope for the best.