m: the frame rate is phenomenal, but why are you still lagging? where is your cape, did it not load yet?  b: nope, that's a blizzard bottleneck
when a game that is many years old can be played at the maximum settings, yet still plays poorly at times due to a bottleneck with the engine or server
"m: the frame rate is phenomenal, but why are you still lagging? where is your cape, did it not load yet?  b: nope, that's a blizzard bottleneck" What is the definition of "blizzard bottleneck"?