This is pretty accurate but I would modify it slightly to:

Superstar Level: Funding over $400,000 a month
Good Level: Funding over $300,000 a month
Average Level: Funding about $200,000 a month
Rookie Level: Funding about $100,000 a month

We all know sales vary month to month basis so keeping a 90 track history is a good way to measure yourself. Look at your last 90 days, divide by 3, and see where ya fit.