What about things people they say they don't know. You can't expect everyone to know everything. You definitely want people to work on things after company's has taken them on onboard.
What is the ramp up time expected too?
The company I work for now actually has fairly long tenure times, 4 years or more. There really isn't an expected ramp-up time. Each project handles onboarding their own way. "Hit the ground running, learn as you go." is pretty popular.