Something changed in Ranked Matchmaking?

Hi Guys,

I became Plat, 2 or 3 months ago, right now since i don't really intend to play the game because i am not happy with the current state i played a game after 27 days just to avoid decay, i was surprised that the time to find a game was so fast, before i quit it was like 10 minuts even with support as secondary role, well i found after the game that my team and the enemy team were far lower rank, all my team was silver and their team was low gold/silver, that game was so easy for me, really, so easy, i wanted to know if riot did something to the matchmaking how it's possible that i play with this guys and, no, i am not at risk of demotion, anyway lets see what i got in 27 days :)