Great pic, Moooo. That provides a good sense of how the extended seats eat up a lot of the dead space in the pit. It does appear that the pit seats are wider (more rows) on one side than the other, as also suggested in this image of the official seat map.
The layout is definitely asymmetrical.
3/4ths of those extended seats in the lower bowl are reserved for student seating: the lower blue sections and I think the orange sections behind the benches.