Trey of lopsa.org wrote a fantastic article on the the techie vs. non-techie divide. If you are in the user-interface market, I suggest you read this. It sheds some wonderful light on this great divide.

In Short

Ordinary Users only see and understand content in a system. Developers and Techies implicitly understand the Metadata that surrounds that content at such an intimate level that they build systems that subconsciously further the divide.

Good Stuff.