Seems they snuck in a little something extra (in case you were wondering about the increased queue times!~)
In the latest game update, we rolled out a second beta test of a new matchmaking change that is live in all territories. This change will increase your average queue time by about 30 seconds, but we hope the benefits are worthwhile.
The matchmaker will now take into account the Number of Wins a player has in every matchmade queue (Normal SR, Normal TT, Ranked Solo/Duo, etc).
This means that for the first few minutes, the matchmaker will attempt to find teammates and opponents that have a relatively similar Number of Wins as you in addition to trying to find teammates and opponents that also have a similar skill rating. However, this does not mean it's impossible to get matched into a game with a large difference in Number of Wins--it's just more rare.
We need your help! Please give us feedback on the changes.
PS - RiotKiddington was the dev that did most of the work.