I def have the non enhanced one compared to my iPhone 5 which has it and my ipad, so something is upWhat you hear is all you get.
Apple improved it a little tiny bit, but Siri still sounds like crap compared to Google Now.
They should re-record everything using a new voice actor, someone who doesn't sound so strict and robotic.
I don't think this is a tech problem, they made a bad choice with the woman they picked.
She sound completely soulless.