If you normalize Doctor Head's graph of the LCD-2 to Tyll's graph and then do the same to the ES10, it still turns out that the ES10 has a lot more midrange than anything else. And by midrange, I mean the region between 500Hz and 5KHz.
Easy way to check: play something with vocals on, and with some bass and treble, and see if bass and treble are still dominating the range. I'm sure you'll be pleasantly surprised. The Beyer and Denon headphones are V-shaped because their vocals (midrange between 500Hz and 5KHz) are obviously less loud compared to bass and treble. Look up their graphs and you'll see that as well.
I'm not too sure what you are driving at. Over the past few weeks with the ES10 I have been listening with different types of music. It's not as if I have not been listening to a-capella tracks. I've come to the conclusion to my ears that some part of the vocals is a little scooped. It's not as if I've decided "these are V-shaped" and then that somehow changes the way I hear them. I don't think it's inaccurate to say that that the ES10 is not a balanced can and that the most prominent aspects are the bass and the treble shimmer.
Maybe I am using the phrase V-shaped inappropriately but to me that seems to be the best description, because the bass and treble are what stand out to me most, and I cannot increase the volume on the ES10 before the upper vocal shimmer begins to get too much for me.
You make it sound like V-shaped is a dirty word or something. I really like the ES10 and (I think) you do too, so let's leave it at that :)