I anticipated that response, but was on my way out the door and had no time to clarify.

From the point of view of the FSF, the BSD license is more restrictive, as it grants fewer freedoms to users. From the BSD point of view, GPL grants fewer freedoms to developers, and is thus more restrictive.

In the context of the question asked, I was approaching it from the POV of the GPL's authors, given that the question was whether the BSD code would have to adopt the GPL license. I apologize for my inarticulateness.