I think blogger must have realised some people hated their old comments system that was just too involved and hard to post to. You had to create a user for yourself, even just for one tiny one-line comment... I guess that might have stopped quite a few people making comments.
So along comes a new, easier to use comments system; and we also get pop-up comments (in my opinion the best way to go). Great. Might have to post an anonymous one here to test it out. Anyone else feel welcome to do likewise.