Facebook comments allow sorting

It seems Facebook is testing rolling out an ability for users to change the sort order of comments based on 3 options with Chronological the default setting:
  • Top Comments - The most relevant comments appear at the top.
  • Chronological - All comments, including spam and comments in other languages, with newest comments at the bottom.
  • Top Comments (unfiltered) - All comments, including spam and comments in other languages, with most relevant comments at the top.
Facebook comments sorting
Facebook comments sorting
Have you seen it yet? Do you prefer the default Chronological setting? What might this mean for Facebook engagement on posts?