Have you heard any of their other stuff? The album they released before that one is entirely acoustic and it's fantastic. Before that was Quarters, 4 x 15 minute songs - brilliant. The Album before that was similar to Nonagon Infinity, but the tempo was different and the album was paced differently.
Nonagon Infinity was set out to be a structured, flowing album of the same pace and feel, not just a bunch of songs put together on a disc.
They've announced they plan to drop 4 albums next year, which will bring them up to 12.
Anyway, they're a really good band.