Considering retail ships had like ~300 tris for a fighter (or something like that), it's not too hard to imagine these exceed the poly-counts of many if not most retail ships.
I'm more concerned about the fact that he's made the flak into a multipart turret, and made the missile launchers into single part 'button' turrets. That's a big departure from the original, and I fear it would affect gameplay.
Nonetheless, these turrets are awesome looking, and even if they don't get put on the Hatshepsut, they would make a great addition to the pool of detailed user-made turrets available to modders.