That's certainly true. One thing that Feltz does do that I really, REALLy like - something that I've mentioned before - is that he hangs on to the last syllable that the unison choirs sing ("nan"). It's a big feature of the Colin Davis Mahler 8 too - my other personal favorite. I think it's done just a tad better on the Davis, but I also like how Feltz picks the tempo back up when the onstage trombones enter. Perhaps if the Colin Davis recording didn't exist, I might feel more strongly about the Feltz.
Eric, how are you listening to yours? Did you buy a cd or a download? I'm listening on Spotify, which may be inhibiting my response a bit. I do have an sacd player, but I don't want to shell out another $30 for the Feltz discs.
I don't have 5.1 surround sound, so I would have to hear the mixed down two-channel sacd layer.
Two final notes: I'm wondering why the bass-baritone solo sounds so distant (?). Also, while the choral response is excellent at the climax of the double fugue - the reiteration of "Veni, veni Creator Spiritus" (they really belt that out!) - something slightly distracting happens in the timpani. I can't figure out what or why.
I do like the relatively large size of the children's chorus on the Feltz. In relation to everything else, the children's chorus is too small on the N.-S./Philly one.
There are some really good things here, but there some odd things as well. For example: each of the 'three penitent women (soprano and two mezzos) sing well on their individual solos. But when they join together as a trio, they suddenly don't sound so great. The situation is the exact opposite on the N.-S./Philly (they sing wonderfully as a trio). Also, the tenor sounds like two completely different persons on his two big solos. At the beginning of "blicket auf", he sounds like a baritone on his lower notes (not a bad thing). He sounded so mannered in his first solo. Very odd.
On the other end of the scale, there is a truly great moment. After the first tenor solo, there's the orchestral passage for high strings, harps and harmonium (the strings are a tad too loud). Later on, the chorus joins in softly. That leads to a climax - with bass drum roll - where the soprano (Mater Somebody-or-another) makes her entrance. That transition is done fabulously on the Feltz. That was a really memorable moment on the Haitink/Philips recording.
For me, the climax of the 'blicket auf' passage is rushed (it often times is). Perhaps Feltz did that deliberately, knowing he would make up for it with his ending to the "Chorus Mysticus".
If the tam-tam were just a bit stronger, the ending of M8 is really good on the David Zinman recording (RCA). He really clubs that final note with his bass drum.