On WoW Forums a Russian player posted:
'you all get n discord all queue as single at the same time if it pops for 75% of the team at the same time you join we love our unfair adavantages'
https://eu.forums.blizzard.com/en/wo...ussian/29366/9
I don't know how widely people do what above poster claims, but if it is a thing, random BG's are much less random today thanks to Discord.