It already worked like that if you added a comment when clicking on Recommend; it would post a thumbnail and snippet on your wall.
Now it seems they've enabled it by default, as I noticed earlier when I was on Facebook, so there is no need to comment to get the thumbnail and snippet.
I'm not sure it's a change for the better to be honest as I liked having the choice of whether to post a single line of text or a logo and more text.