I recall reading that too. As such, I get some hq items on the lowest level hw gather stuff, but the topmost item I can get with them yet as I just barely pass the gathering score for it doesn't give any hq. I assume that when I update rest of their gear to match, giving them also reasonable perception score, I'll start seeing hhq for them too. That makes me wonder if there's invisible perception wall for the hq items, as there is the visible one to be able to get them at all.