I think one would have to say that to a small degree the very upper mids are very slightly recessed versus the rest of the midrange. The lower mids are not boosted, but there is a very slight reticence in the upper mids/lower treble, like the LCD-2, but not as pronounced or noticeable. For me this simply provides means that the sound does not drift to brightness, and sounds very natural, but it sounds like they might not be the thing for you.
Isn't this the same as the LCD2 R1, although perhaps the recessed part is not as prominent as the R1? When I compared my R1 and a R2, the latter seemed to emphasize or accentuate the upper mid part a bit which causes the upper mid to lower treble presentation to be not as smooth.