With all of the difficulty here in the US concerning complications with pill extraction and ever spreading legislation restricting pseudo at the point of purchase, I wouldn't be surprised if street cooks aren't already secretly substituting amphetamine for meth.
If they aren't already, who knows, they probably will start soon. That is of course until Mexico floods the market. Charlatans could probably get away with it for a minute.
Definately will agree with josef, pure d-amphetamine is some potent shit in its own right.
I believe many people would choose "pure" d-amphetamine over 30% meth if given a side by side comparison.
Swim would...