do sub-30 teams follow the meta at all(sustain character top, mages mid, support/ranged ad bot, jungler) or is it a crapshoot like when I was leveling
Kind of. If there's a support, it seems very common for them to be smart enough to go bottom, but whether or not they're running with someone who'll take full advantage of it is questionable. The match I mentioned... I ended up bottoming with a Talon (formerly Lux who was stupid enough to change and later went "I knew I should've kept with Lux I know how to actually play her") who didn't focus on the minions at all when it's kinda his job when he's with a support to get the last hits...
But yeah, generally, a mage takes mid lane, and two go bottom (Whether there's an actual support down there is random). Whether there's a jungler is an extreme crapshoot; if not, you'll get a dual top lane instead and the players will occasionally dart into the woods to grab a particular buff they need or (even rarer) go do dragon.
EDIT: In other news, Armor of the Fifth Age Taric is
absolutely FABULOUS