I'm not gonna lie, this is just blatantly untrue. Launch weeks regularly destroy the servers, Blizzard randomly gets DDOSed on given weeks for several hours at a time, and latency in general has gotten worse over the years. Sitting at 2ms means nothing if the actual world server latency is high due to an issue on their end. I'm speaking from experience here, given I played Legion and BFA basically most of the day every day of the week.