I’m not sure if this is common, but I’m seeing a consistent lag when I reading through my Everything folder. It’ll load a bunch of posts, then when I’ve gone through them, it takes 3-10 seconds to load the next bunch. Hitting “J” will do the trick at time, but I often have to hit “Next Unread” to keep going (could be my impatience rather than actually hitting it doing the trick), and sometimes I have to just reload (by hitting “Everything”) to get the next batch of stuff.
I’m using the dev site, not sure if that could be part of it.