Non-functional requirements & QA test strategies

I received an interesting comment on my index post for non-functional requirements, from leathej1. Below is a short clip.

I just posted something on my site that has been gnawing at me for a few years - the fact that in my mind there is no such thing as a non-functional requirement. As defined in the traditional RUP sense.

A link was provided to leathej1's blog that contained his rationale. I'm still mulling it over in my mind but his post called, The Fallacy of Non-Functional Requirements, contains an excellent QA test strategy covering off the testing of "non-functional" requirements. I encourage you to visit his blog and check it out.