>>184341691500 elo pleb here too. They're talking about the glicko rating. 1760 glicko is like the top 2% of the ladder already. Any higher and they'll have too small of a sample size. It already sounds pretty elitist if you think about it.
Amusingly, I went 22-1 on an alt and reached 1760 glicko by luck (tried out that Charizard Y team guide on smogon). I felt so dirty afterwards. They also thought about using 1600 glicko but that one's much easier to reach.