That's true Andy, including for 30 pin connectors. But what threw me was that Matt bought the cable from Monoprice which would lead me to believe it's a full-featured, all pins connected, USB cable, not some thin charge-only model.

With regards to the dock connector, you can tell even by looking at the wire casing thickness that some cables are not fully wired. Charge-only cables can be super thin, whereas you need more wires if you're also going to do USB data and then more for analog audio, video, etc.