Ha, I've only just hit 22 so 24 isn't quite feasible for me yet. Playing on xbone with no friends on destiny means I'm relegated to faction/crucible grinding for decent weapons and armour I think.it does, at level 24 difficulty you get level 12 drops, usally uncommons. at level 26 difficulty you get level 15 drops, uncommons and even rares! Haven't tried 28 yet. maybe you get level 20 rares, if you're lucky.
of course when you're full of legendaries and exotics you start seeing some legendary item drop.
thanks bungie for the great loot system.