What you should really have looked into is Grand Company ques. For example on Aether if Maelstrom says 20 mins and getting a match every 20 mins flames seem to be at 40, but adders are at 5-10. Now because the que system is a broken mess that SE won't address (not grand company related).

This is just an observational evidence from playing. But I am sure others will back up that one Grand Company in your Data center is queing way faster.