Thank you very much for the link. Haven't heard much about this in ABQ but gonna ask around tomorrow. It does sound like a contaminant or by-product is present, and doing the damage. Because as they say--real meth is a mild neurotoxin, and takes crushing doses for years to take a toll, but this sounds like anything but mild. That the psychosis is so much worse also interesting.
Unrelated, but along the same lines, users report a major change in the effects of MDMA (xtc). It's a modified methamphetamine and typically doesn't start with meth, but I am betting there is a connection as new forms of synthesis have been discovered for it, one in 2016--again by seizing drugs and finding new trace molecules on analysis.
Effing frightening is what it is.