The way I read the document they only have 4 data lanes which seems really odd. If so that makes your question even more interesting. It is almost like this is part of the security arrangement in that dynamic data lanes makes it difficult to just plug in a connector and grab a port. Or in other words there are no data lanes until the authentication process succeeds.
Or taken another way this is an extended effort to screw the consumer as the port offers no real value other than limiting choice.
The 4 data pins make sense when you consider that current iPads/iPhones only have 8 contacts and only connect to one side of the lightning cable. I suppose in the future if they come out with a device requiring more pins, they could redesign the cable and port to utilize both sides while preserving backwards compatibility with the current cables.
I don't think it is fair to accuse apple of screwing us just yet. We still don't know the full capability of the port. For example we have only looked at the USB data cable. Remember, the old 30 pin dock had pins dedicated to things like A/V out and control inputs. I think we will likely see accessories like external speakers that will reassign the "data" pins to things like controls and A/V.