Hmm, I'm very interested in this because I have had a set of Lumina V towers in my family room system for over a year now. I've heard that people find the Lumina speakers bright, now seemingly confirmed by these measurements, but mine just don't seem bright at all to me in my room. If anything, the tweeters seem tame to me and I find myself wanting more "air" and clarity to the highs.
Now, there may be a couple reasons for that impression. First, I do have age related high frequency loss. And, secondly, my family room is fully carpeted, has curtains on the rear windows, has a large heavy L-shaped sofa, and is open to the breakfast area and kitchen. So a lot of the high frequencies may be lost to those factors.
Also, I do not get much of a sense of imaging or sound stage from them, sitting 10 feet away. Would the dispersion data correlate with this?