Is 39 more active than 29's here?
Hard to say. 20-29 pops daily without even trying, but we've got more people organizing at 30-39, due to the better balance and more connections to former 39ers. 30-39 would pop daily, but lately we've been focusing on building more twinks, alts, and getting new players leveled and geared up as well.
How is the twink community on Molten? Are there any brackets that pop daily?
10-19 used to be running almost constantly 24-7. Since Cyclone, the 19-only server, came out, it's only been popping daily, but still pretty often.
20-29 is popping almost every day. It's more reliable during EU primetime however. There aren't enough US players on alliance to get reliable pops regularly during those hours, so we mostly focus on 39s then.
30-39 is pretty close to daily pops. We've stopped pushing it though, because it wasn't all twinks, and it'd often be 7v7 or 8v8. Today we're actually starting to run specific days/times to queue so that we can get a handful of excellent games, then go back to recruiting and building more twinks. That said, we do arena pretty regularly too, and it's insanely fun. Really well balanced.
40-49 is not popping yet. We've got probably a dozen players on horde, but we're waiting on more alliance to build twinks and let us know they're ready.
70-79 is popping daily too, probably as often as 10-19, but I don't pay close attention to the higher brackets.