True 5.1 surround sound from headphone port over a Toslink cable?

http://support.apple.com/kb/SP690 page regarding the headphone port simply says: "Support for audio line out (digital/analog)". So, in planning a purchase I have the following 2 questions:

1. Does the newly released 15" MacBook Pro w/ Retina display have the ability to output true 5.1 surround sound or is it only able to output simulated surround sound? In other words, does the newest MacBook Pro decode the 5.1 signal (separate outputs front center, fronts, rears and subwoofer) over a Toslink cable pluged into the side headphone jack?

2. Using the above confuguration will the new MacBook Pro be able to play true 5.1 surround sound on HD movies purchased or rented from iTunes?