I've been reading some of the threads about Google's attempt to give higher rankings to high-quality content. Perhaps one of the problems is that there's a lot more low-quality than high-quality on the web.
I say this because I'm working on a new article about a fairly well-known historical event, but when I search for information on Google, I can't find anything of much value. I have an old book published almost 60 years ago that has far more information about the subject than anything I can find on the web.
So I guess my point is that a lot of low-quality content is getting high rankings in the SERPs simply because there isn't any high quality content.