According to Massey's computer rankings, Calvin's volleyball team would be #12 in D II. It would be #85 in D I, in the top quarter of D I teams.
Is there less of a difference between D I, D II, and D III in volleyball than in basketball or football? I can't imagine any D III basketball or football team better than three quarters of the D I teams.
Or maybe comparisons between divisions are inaccurate because there are so few inter-divisional games.