Knowing even a minimal amount about lighting I can tell you that what you're saying is completely false. CCFL flickers 60 times a second...
Not sure if it's the frequency or what, but there is definitely something to LED backlighting that bothers some people. I got terrible eyestrain and headaches from the $400 Auria 27" monitor that Microcenter sells (which, by the way, is now using the same matte panel as this monitor). I'm not sure if the glossy had anything to do with it too, but I had to sell it to a friend since I couldn't use it for any more than a few minutes without heavy headaches. It was worst when web browsing, largely on light/white backgrounds. The small text didn't help either.