It might decrease piracy but a 24 hour delay is still not what I would consider a 'simultaneous' release in Internet time. People want to watch shows as soon as possible and participate in discussions about the latest episode and a lot of people turn to the internet to do that. A 24 hour delay will still make them feel left out.

That being said I really welcome the move to reduce the time between US TV debut and iTunes release and hope that the time gets reduced further in the future.