You're right, it does depend on people's perception of quality. I can only recall being frustrated with the scraper sites when they don't have the answer I nee

You're right, it does depend on people's perception of quality. I can only recall being frustrated with the scraper sites when they don't have the answer I need, because when I go back to the Google results and try another page I find that they have the exact same scraped content. Out of the first ten or twenty results there are only a few unique pieces of content. Perhaps if Google eliminated redundancy from their results I'd never even notice whether the content was scraped or not.