Repost bots (which repost contents from other sites) might be to blame for a lot of this. Or the fact that, because there are loads of (for example) World News communities, people will post the same links on multiple communities, but most people will only comment on one of the submissions. Which pushes the link-to-comment ratio up.
Beyond that, it really depends on the community I think. I see far more of that when browsing All than when browsing Subscribed.
Google Maps is the last Google thing I rely really heavily on. I would love to be able to replace it with OSM but searching for places is far better on Google (admittedly, probably because they have more context for your search due to all the spying). I also rely a lot on Google reviews when I'm in a new place and just want to grab a coffee or a drink or something. Could probably use TripAdvisor for that though.