Funny you should say that because to my ears, at least in the heavier gain tones, the effect is exactly the opposite. The high end is a lot more pleasing, almost as if there's already a Low Pass at 14k or so built into the tones. Here's a quick A/B between my main high gain rhythm tone (using the CCV 2B):
https://on.soundcloud.com/wnDEmJngKJ1tW4bBA
The first half is 25.04, and the second is 26.00beta. Levels have been normalised for all tracks in my DAW to avoid any Fletcher-Munson funkiness, and both takes are re-amps of the same (kinda sloppy) double-tracked DI recording.