Anyone else notice this comes from Julius's site?
Hehe..
I think this quote says quite a bit:
QUOTE
So you're the experts?
We're not the real heroes as far as LAME goes; We don't do actual coding for LAME (yet), although our meddling and 'interference' is appreciated by those who do. Being frequent users, we do many tests with it based on personal taste and personal interpretations, and we can in no way be held responsable for bad results on - for example - heavy metal music encoding using the latest alpha version, since we don't really use it on that genre. THIS webpage is maintained by us, Hens and Julius. We both use LAME and MP3 professionally, and the settings mentioned on this page are NOT up for discussion, they are more than sufficient for the audio WE encode. We like to emphasize that you should NOT rely on any of the so-called "test results" available on the www; There are some very slick charlatans busy spreading lies about audio quality issues involving LAME, MP3 and VBR. Also be aware that there's a lot of money involved in MP3 (and MP3 encoding); We've bumped into carefully thought-out misleading scams by commercial competitors of LAME. Make sure you check different LAME settings YOURSELF, do not blindly follow comments written by self-appointed 'experts', especially in cases where they seem to have too much time for the issues at hand. The only source of truth for LAME is the MP3enc Mailinglist
Emphasis added.
Basically, Julius was around on r3mix.net during the dm-preset days. Myself and others were doing some great tuning work, and unfortunately for some odd reason, Julius didn't like this. I guess maybe because he wasn't a part of it or something. Anyway, he started a lot of flame wars, proved that he couldn't hear artifacts worth a damn, and basically made an ass out of himself. Then he retreated from the forum and created the website you found this setting on. This quote that he added happened directly after he left r3mix.net, and at one point in time he actually listed myself, CiTay, cd-rw.org, and I think ff123 on his page as "bad people" or something like that because he was basically bitter over the whole thing. Of course, our names were mispelled... just a childish jab from J since he couldn't really do anything else

Anyway, this guy doesn't know the first thing about quality.. I wouldn't trust a single sentence on his site. He doesn't believe in blind testing, and he thinks that anyone else coming up with different results from him is obviously lying (the cause of the whole problem on r3mix.net actually).
This is just another example of one of the sites out there which ends up confusing newbies. Only this one is even worse than r3mix.net...
Oh, and btw.. one of the best tests for knowing whether or not someone really understand what the switches they are using do, is by how they use -Z.
In J's command line -Z is specificed but withoug nspsytune. This will do the opposite of what he's trying to do (disable noise shaping 2 and switch to type 1). Noise shaping 2 on it's own without special tweaks like the --alt-presets use, has problems. Most people don't understand how the switch works though. It's clear that in J's case that he just did the old copy/paste routine...