Off-meta queue times in teambuilder.
Maybe Riot has said something about this somewhere, but I haven't seen any info on it.
When I queue up an off-meta pick in teambuilder, the wait time before I find a group is usually significantly longer than meta picks. It might take 5 minutes to find a group with an off meta pick instead of 45 seconds for a meta pick around the same time of day. Is there a system in place specifically designed to give meta picks higher queue priority, or is this the side effect of something else in the match making system I don't know about?