I recounted this tale of horror on Google+ and Facebook recently. I wondered if I should put it on the blog- a few weeks later, the new “embed” functions on both platforms is as good an excuse as any. The Google+ embed is below, followed by the Facebook version.
In each, the “see more/read more” function opens the text within the widget. This is also true for the comment left on my G+ post.
For G+, the comment shows up in the widget, while for Facebook they do not; when you click on the Facebook comments link, you are taken to Facebook.com. The same is true for +1 vs “like,” and commenting on either widget. Go ahead, click around on each widget and see what you find.
(ETA: Rachel Levy points out that on the mobile version of this WP site, the G+ post does not show up; even when using Google’s own Chrome browser (which probably does not make a difference.)
(ETA II: The issue was cause by the mobile press plugin – ht Danny Brown. I suspected WP was the issue, but found it strange it did not affect the Facebook widget. Never a fan of mobile sites for the sake of mobile sites, and noting changes in design and device capabilities in the last few years, I am more than happy to get rid of it.)
All that is good to know if you are concerned about keeping people on site. Google+ wins overall in keeping functions within the widget, at least as of this writing. Facebook, of course, may still be your main content wellspring, so there is no clear winner if you factor that in.
In all, an interesting way to share your content on your owned platform, with the usual caveat- the content is still hosted elsewhere, and if you lose that account- or the entire platform, you must back up or forget about it.