I'm convinced there's some prequesite im not meeting for me to start seeing legendary drops and rewards. I'm level 24 and I haven't evenn seen a legendary engram. AND I have never seen anyone I play with get one either.
I'm level 24 and I didn't see a legendary engram drop for me ever, until an hour ago. By RNJesus it managed to be a legendary weapon.
The only prerequisite is playing more and luck. Heavily more towards the luck side though.