Not sure I see the point. I've never thought "OMG I wish my iDevice would sync 10 seconds quicker". Another connector on the iPhone would just bring the trolls out.
I'm surprised at the lightning port really as it does have the same limits as the 30 pin dock connector, just smaller and bidirectional. Why they didn't go for a Magsafe connection with the connections available for the optical thunderbolt setup I'll never know.