I'm guessing that's what he meant, yes.
The old 30 pin output on older i-devices only support USB charging, USB data , analog audio and video output.
That's the reason why the CCK has an ADC is to convert the analog ouput from an older 30-pin equipped i-device into a digital ouput that can be sent to an external DAC.
The new lightning connector on the other hand ouputs digital signals (both audio and video) instead of analog, hence no need for the newer lighning CCK to include an ADC.
More reading material below...
https://en.wikipedia.org/wiki/Lightning_(connector)
http://irq5.io/2012/06/25/the-apple-30-pin-dock-connector/
http://blog.jdslabs.com/?p=838
edit: (added a comment that iOS7 or later is needed to fully support streaming digital audio, also changed DAC to ADC for the technical perfectionists)