licensing gpl

Hi Team,

I'm new to Drupal development and its legal issues related to GPL licensing, so, please read through my doubts/concerns and guide me in the best proper way possible.

We (as a team of Drupal developers) work for a service-providing company. Here, we utilize Drupal for few clients, using core and innumerable contrib modules.

What is the basis for the claim of http://drupal.org/licensing/faq#q7 ?

Disclaimer: I am not a lawyer.

Primary fact: Whether or not something is a 'derivative work' is defined by copyright law, not by the license.

From my reading, it seems the question is far from settled in the United States in regards to software. It seems to me that the legal validity of the claim "Drupal modules and themes are a derivative work of Drupal" is suspect.

See, for a example, http://www.rosenlaw.com/lj19.htm for a lawyer's opinion which counters the claims of the Licensing FAQ.