It's a pretty rigorous standard, esp. in Div. 1, where you have 8 sectionals funneling into the state meet -- an extra qualifier essentially has to be better as a 4th-place finisher in a sectional than a sectional winner somewhere else.
Here are the numbers from this year; extra qualifiers are pretty few and far between:
It is always interesting to see the dropoff in competition between D1 and D3. 11 Seconds in the mile for boys, 21 seconds for girls!
Something to be said for a small school where you can be a state qualifer, where the same time might not make it out of regionals in D1.