I have just received my Frequency Response Graph for my LCD-X from Audeze. If you also have one you may wish to post a copy and compare the difference.
I spot a frequency response tilt! Sean Olive would be very happy...
EDIT: Here's Tyll's measurement at innerfidelity:
The link was found over in the long LCD-X thread. The curve is similar to those posted above, but with less of a tilt.