It appears that occasionally in Competitive Open Queue the matchmaker will, every now and then, place you in matches against players from across the continent.
Considering the size of North America this can result in extremely frustrating experiences when, for instance, a player on the East Coast is hooked into the data centre in California. This results in 95+ ping, opposed to the 40-50 one would normally have, and makes the game very frustrating to play.
Hoping for an acknowledgment of the issue and hoping it isn’t a case of "Working as Intended"tm quick-matchmaking at work.