What @draw2much said is right in that if you can get both, why wouldn't you? Based on what I've seen on mine, a lot of readers prefer quality over quantity, which I'm totally fine with because I prefer the same thing myself when I read other stuff on here. Doesn't mean they don't ask me when I'll be posting the next chapter though lmao (which doesn't offend me tbh). Plus if fast release = quantity, then what counts as "fast"? Personally, one chapter a week is above average for me, depending on the type of novel as well as the length of each chapter. If it's Chinese, 3+ for those with shit tons of chapters while 1-2 for less but if it's Japanese, 1-2 for long ones and 3 for short ones. But either way, I have a lot of stuff to do aside from read anyways, so quantity to me doesn't really matter. I have a list of novels that I specifically get updates on on the front page of NU but I'm in no rush cause I don't even have the time to read them.
I do think a lot of people will say quality over quantity on this site because there's been a ton of MTL translators coming out of the woodwork, and idk how much there is really, but based on what I've seen, there's way more MTL than actual/edited-into-coherence translations. I legit get physical headaches when I try to read some of the MTL'ed chapters so quality all the way for the sake of my health.