It's unfair to compare a striking art school with a grappling art school. When a striking art student is still punching into the thin air, the grappling art students already wrestle with their opponents on the mat.Check out your local Gracie Barra BJJ schools, and I bet they have 300 students or more, and also maintain high standards.
In striking art, sometime you think you have but you truly don't have. In grappling art, 5 rounds of match can truly tell whether you have or not.
Old saying said, "三年拳不如当年跤 - 3 years of striking art training cannot match with 1 year of grappling art training".