Iv'e been focusing on comments on social media for I don't know how long. It works 90% of the time as a pretty good summary for some reason.

I do this on hackernews, and especially on news-sites I check (cleantechnica, electrec, reneweconomy) and I actively shun sites _without_ comments.

If you're only reading the comments you have no clue how often it actually works as a summary.