Not trying to set anyone's hair on fire here, but I'm genuinely curious. I've just come from another forum site (which shall remain nameless) that totally dismisses the HD700 as over-bright crap. Here on Head-Fi there's a well attended appreciation thread. Even given that we all have different tastes and hear differently through different equipment using different music, I still wonder at the diversity of opinion; it's like there's two different HD700s. Somebody above mentioned sparkly treble but to others here it seems to be a non-issue, which is the more surprising when the 700 is being compared to phones like the HD650 and LCD-2.
Note that I have no opinion whatsoever as I've never heard the HD700; I own the LCD-2. However, the FR does seem to indicate a certain imbalance. (I wouldn't want to sit on that spike at 6.5khz, for instance).