MPC doesn't necessarily drop ship. They lease a section of Meyer's facilities, though I am not clear if they simply buy the chicks from Meyer outright or just give Meyer a percentage of the cost? Regardless, MPC has their own sexer(s) for bantams at the least, and they offer their own customer service.
The reason their shipping is so high is because express shipping is mandatory-- because of the small number minimum chick order, they must ship express so that the chicks arrive asap. Less chicks means less bodies to keep each other warm for long periods of time.