jimbeetle - 1:58 pm on Oct 4, 2012 (gmt 0)

Are any/all of these three things the reason my sites are deemed "low-quality"?

It might not be any of those three things. It all depends on how google defines quality.

This thread [webmasterworld.com] discusses a post by an Xoogler in which he states that user behaviour, interaction with a page or site (bounce rate, page views, repeat visits, etc.), might be an indicator of quality.

And over the past few days I've had this tug in the back of my mind that maybe entity analysis might be at play here. Is authorship assigned? Is the page shared by visitors? Basically any signals that might help determine if the "thing" really is a thing.

It's really almost impossible to tell what quality signlas Google is using at the moment.