TL;DR: "We were able to measure that there are some toxic particles emanated, but failed to produce any meaningful results about quantity of said particles, or potential danger to consumers, in any way."

To me that says, the quantities they did measure were too low to publish for this alarmist article.

From the article: >all tests indicated at least some level of toxic response (though the toxic response varied by filament type). >The sheer variety of the toxic substances produced by these printers was alarming. No less than 200 different volatile organic compounds (VOCs)

uh huh. The "sheer variety is alarming" line was about where my eyes started to roll, finishing their 135° journey after confirming there are no meaningful stats in this article.