Flex or solo is relevant here.
Some really good players in solo/duo are going to be popping up in silver/gold at first for flex, since it's only loosely based on last season dyanmic queue rank and people haven't had a chance to climb yet.
In solo/duo land most people are roughly a tier below where they 'belong' since they haven't had a chance to reclimb.
(Also, ryze the champion is actually really good at waveclear once people know how to combo him properly, so if he's not pressured out of lane getting 10+ cs/min with ryze doesn't require pro mechanics to the same degree as some other champs. Still impressive, but I'd probably judge ryzes by their ult usage more so than their cs.)