I only got in the 250-500 bracket myself, but its from not a huge amount of playing.
Definitely a lot more human players than normal, I had a bunch of great battles 8 v 8 & maybe even higher 
Biggest rank I saw was a bit over (or under?) 1500 so there's at least that many active players.
Is the Equipment actually better than normal & somehow German specific?
Edit:
Block Quote
In addition, participation in the personal ratings will provide an opportunity to acquire the unique special projects of Germany — equipment developed by German engineers specifically for heavily-armed, high-speed aircraft.
It is suitable for all aircraft of the corresponding period and is distinguished by significantly higher characteristics than its standard counterparts.
So is not German specific, is better than normal 
Edit2: So in Depot they are labeled as Special German Equipment.
My Stock Uprated Engine has +4% Acceleration, +2.5% Cruise speed with the standard -5% fire resistance.
Edited by hoom, 06 February 2019 - 07:16 AM.