I does state that they like to mount their seats as low as possible with driver comfort in mind, pretty much like every chassis. Seat used and driver size/build come into effect, but not an extreme height difference.
Chavous or Edge: 8 1/2" to 9" (no higher than 9 1/4")
Select, Grabber, or other super low seats: 8 3/4" to 9 1/4" (no higher than 9 1/2")