In January Google started to display favicons in the desktop search results, only to mostly remove them a month later after a lot of criticism. But since then Google has been testing showing these favicons to a limited number of searchers and they continue to do so today, even four months later.
In the past couple of days, I had numerous people send me screen shots of them seeing Google show favicons in the desktop search results.
Here are some of those:
Google probably let favicons be displayed to like 1% of searchers or less, that is my guess.