Thanks. This is what I've seen as well, but all of this has happened with three days (now two!) notice, I thought/hoped it was something else. I'm still kind of in shock that I replied to a plea for moderators and ended up as a respondent, especially since another in-field person is moderating the panel. Also angry.
Why angry? Moderator isn't worth putting on a c.v.; "first respondent" is (but when I used to put it on mine -- before I had a bunch of big-deal conference presentations -- I believe we all called it "commentator"
This falls in the category of "conference 'presentations' that can be done on the plane, train, or however you're getting there" -- I hope at least they gave you the papers in advance so you can read them, highlight, jot down notes, and write down one or two good sentences of overview, as well as putting a question at the top of each of the papers.