Wikipedia's article follows straight into the same failures, by depending more on the book, and record sales, than logicoriginal research, or on online articles from authors not trying to push more units, and actually interested in the groundswell.

I'm bringing this up, because I went to the Dethklok show last night.  Dethklok's album, released last year, was the highest charting death metal album (#19) to date1  But after suffering through Chimaira's set, it's clear that unless we pay more attention to Pitchfork2  than wikipedia, NWOAHM is going to follow "new metal" right into the terrible rhythm-based non-music of nu-metal.  Chimaira's songs actually include "choruses" (gang vocals/shouting) like "I HATE EVERYONE". It's godsmack/disturbed/mudvayne all over again.

That anyone could think of referring to them as "groove metal" having seen Soilent Green's death/grind performance 15 minutes beforehand, is absurd.  Soilent Green has intense tempo shifts in their songs, that would actually make you shake your ass, if you weren't so busy throwing horns and/or invisible oranges.  And they have the decency to not to take themselves so seriously.  The singer referenced their 'old stuff', only to remind himself by polling the audience that very few in the audience had ever seen them before.  It was a great show, although I do much prefer their latest album to their older stuff

Dethklok was exactly as amazing as I imagined.  The show did start with a commercial for the new battlefield game, which would have been pretty annoying, if we weren't about to watch a cartoon.  The show leads off with a bit about turning fans into mutants in an attempt to subvert their economic influence.  When the band took the stage, it was at first easy to pay attention to Mike Keneally and Brendan Small trading solos, and the live band just generally being awesome.  After a few relatively narrative song-isodes on screen, the cartoon turned towards performance based, and it was easy to forget that there was a live band onstage.  Mike Keneally did a fantastic job, despite having gone gray since the last time I saw him (Wood + Smoke tour, at Martyr's).  I do wonder, though, if the animated interludes between every other song were as much for the band to rest as for the amusement of the audience.  My only gripe with the show was that Austin Music Hall's A/C could not even come close to dealing with thr crowd.  Despite being here for SXSW, and having seen a couple of outdoor shows here, this was the hottest show I've been to since Lollapalooza day 2.

1. Since then, albums by Opeth and Children of Bodom have followed closely (#23 & #21 respectively), which speaks to a real groundswell for extreme metal.
2. When I think of the recent upturn in metal, I think of bands like Mastodon, ISIS, Sunn O), who have garnered indie-rock followings right alongside metal followings.  That following has spilled over into other metal bands, generally reviving the genre as worthy of mainstream attention.  Metalcore bands like Chimaira, Trivium, et al, fail to attract anyone who's not interested in being part of "the scene".