The golden ears graph looks a lot closer to what I hear (with the exception that IMHO the etymotic has a bass deficiency - not in tonal balance, but it doesnt do too well with many kinds of bass that arent "round" for lack of a better word), and the difference between the two suggests a difference in the HRTF used.
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The bass doesn't seem like it should be a problem but it sounds off. There's a good amount of detail there that's compromised by a kind of lack of impact. That's why I've been looking for a BA IEM with a bass boost for some time. Unfortunately so far I haven't found any that don't overdo it and boost into the mids.

Hi all,

Frost tips and deep insertion (all the way 'till the cables touch your jawbone) solved my problems.
Now the P is bassy (!) and the S almost flat: can't spot peaks...
Learned a lot of stuff on the UDAUDA blog...

I found sibilance at 8k which became difficult after about 30 minutes. Did the deep insertion thing too. Although bass extension was generally OK, I found the bass slam lacking. EQ did wonders for these though and they are actually on my list to acquire.

I never got any decent results with any of the boxed tripple-flanges. Neither the small translucent nor the big grey were decent in terms of isolation or SQ.
The Ety-Foams were nice but they don't last quite long.

I should mention that I use the HF-5...

Right now I run them with a 75ohm adapter cord on custom portable cmoy with a (rockboxed) sansa clip+ with any options on default (no EQ) but the +7db bassboost option (rockbox) which levels some lower mids and upper bass as well (or default crossfeed and +5db bass-boost)

But now to the interesting part. I cut off the first section of the tripple-flange and put this small part behind the rest to basically create a bi-flange.
Side-note: reverse the small part behind the bi-flange to give it some support -> better seal.

http://i.imgur.com/VqstJ.jpg

here a pic to clear things up a bit.