The All feed on both Hot and Active modes is exactly the same as it was most of a day ago, all the same posts in the same order, except they're all 12h+ old now. At first I thought federation might not be working due to overload, but on New posts are coming in all the time, both local and remote.
my sort of choice on jerboa is 'new comments'. it gives me a good mix of both new posts with no comments and posts with active discussion. keeps it pretty fresh.