I certainly notice this too. I remember searching for technical queries and would find many (not SEOsplurge) blog posts or random forums where the question is discussed. Now it is just the same stackoverflow answer replicated across multiple content farms.

Peculiarly, I have found the more 'genuine' websites by using image search. Perhaps because more things fit into a grid, and I can usually gauge whether the website is genuine or a botfarm from the images its author chose.