It's probably buried somewhere. What exactly do you want to know?
In a nutshell, matchmaking selects on SR first, then DR. Qualifying time is only used to sort the room.
The algorithm goes like this:
Select all entries with 90 to 99 SR
Sort on DR, create rooms for highest to lowest DR
Last room (with lowest DR) likely has spots left open
Select all entries with 80 to 89 SR
Sort on DR, use highest DR to fill up the leftover spots from the previous SR selection
Create more rooms in this SR range, last room (with lowest DR) will be filled again with the highest DR in the next lower SR bracket.
Etc.
The obvious problem is that 90-99 DR.D players get to race against 80-89 SR DR.A+ players. A simple change would fix it. Fill up the last room (with lowest DR) of the higher SR bracket with the lowest DR players in the current (lower) SR bracket. And no more reward (easier rooms) for lowering SR.
I haven't raced in a while, too much fun flying instead
Maybe one day the two games can be linked and I can follow multiplayer races from the air
Spa GR.2 sounds interesting, but it doesn't look like the penalties nor online etiquette has improved yet. My opponent atm is the weather
That's the alps yesterday. No visual of the Pyrenees today, big thunderstorms throwing my plane around.