I kinda believe you need to pick the breeder & then look at the doggy parents. The thought that you benefit from sifting through the siblings for individual characteristics, especially at that young age isn't realistic. I'm sure some will say otherwise.
Will the evaluation make some feel better, that they gave due diligence to the selection process, yes. Once you select the breeder & see what their line is all about, then you move on to the Mom & Dad. More that once I've read you may as well close your eyes & pick one.
That said, with our previous dog, I actually set one down to go with another. My Wife said I got the 'wild one'. As always, no matter what you do, you end up with a mostly blank slate that needs to be developed.