The Great Rank Shift of 2016

Valve moved back the CS:GO competitive ranks so if you play enough CS:GO you will encounter someone that will say something along the lines of "I was LEM before the rank shift". They are usually around the skill level of your average Silver 4.

Proof of this historic event here.

Steam Group avatar is a graph of the ranks before the Great Shift.

Proof of the most devestating thing to have ever happened to the Counter Strike community