Dhaan,
Interpreting anechoic measurements is an interesting excercise. Depending on testing technique, results may vary considerably. Assuming that the graph you cited contains no measurement artifacts in the bass (no sure thing, at all), I'd still read this graph much differently than you do.
These speakers aren't 6-8db depressed in the presence region. The full treble region is shelved down about 3 db from the bass/mid and you are seeing that transition. This downward tilt in anechoic response is almost always a good thing for in-room performance. Unless your room has a major bump above 80hz (and many do) to balance the increased presence/treble energy experienced in most rooms, flat anechoic response theough the treble will sound awfully aggressive in-room. If you employ a Hemholtz resonator to correct for this bump (bass trap, bass busters, etc), you will certainly appreciate the Verity's response pattern.
The graph looks worse than it is because there is also a troubling looking suckout in the lower treble from about 3K to 5K. (This range begins in the highest octave on a piano and extends past C7, well above what I'd call "presence".) II've never noticed this issue on my (pre-Ovation) P/Es, but it may be unique to the Ovations. It might make these sound a bit darker than mine, but again, this is tough to predict in-room. In any event, I would never dismiss a speaker based on this anechoic test result.
Marty
BTW, have you ever actually heard them?