Vector makes a good point about getting to a PG showcase to find out where you stand. And having a 60 timed with a laser will definitely be more accurate than a stopwatch.
I'll go ahead and address Saints9's question, to, because it sort of fits.
First and foremost (and until I am blue in the face) do NOT get hung up on the number that PG gives you. It is a great tool to see where you are, and get an objective evaluation of your skills and what you need to work on. Great experience to share the field with the best players in the country.
Some examples of the kinds of numbers that will help you on your way to a "good" rating at PG Underclassmen.
Catcher: 5-9 175
60: 6.95
Throw from OF: 91
Throw from C: 82
Pop: 1.93
PG rating: 9
Unweighted GPA: 3.5
This is one of my favorite players. He has that very tough catcher mentality, great teammate, guy you want to have your back. Good hitter. I'm thinking he'd be a 10 if he had a more "projectible frame." (i.e. 6-3 instead of 5-9)
He had a ton of JUCO offers and a little D1 interest. He'll be going to a top JUCO.
Middle infielder 5-10 160
60: 7.18
Throw across IF: 79
FB: 88
PG rating: 7.5
Unweighted GPA 3.8
This is my very favorite player.
He did not get tons of offers, but is going to the very same school, and they will likely room together.
Middle infielder 6-1 160
60: 7.25
Throw across IF: 85
FB 83
PG Rating: 8.0
GPA ...let's just say "on the bubble" as to whether he'll walk in May. No offers at this time.
A "good" rating is in the eye of the beholder. But a PG showcase will definitely help you figure out what level to target.