To be perfectly honest, I find Blizzard's ms readings to be absolute bull!@#$. I've been playing the game for years, and even with my supposed "200ms", which is what I usually cap off at unless experiencing major lag spikes, I still feel like I'm playing at the solid 500ms from all those years ago, just on an exceptionally good day.
I find it strange that the moment they implement this "home" and "world" ms, I'm magically playing at one third the latency I have for all the years previous. My usual home and world ms will hover around the 180 - 190 mark, at times dropping down to 160 which is blatantly false. While I will tip my hat to them and acknowledge a noticeable change, it's very small and basically useless for truly competitive play or getting the very max out of your character.
If you use lowerping/battleping/whatever else is popular right now you will certainly notice a huge increase in your game experience. It actually makes the game all new and shiny again until the novelty wears off.
While you used to be able to point to the ms and say "Wow! Look at the difference! No wonder it's so crisp!" that doesn't apply any more. Your ms readout won't change so significantly, but you'll be shocked at the responsiveness and ability to actually play the game
that, when it comes time to sink hours into your character at endgame, you probably won't be willing to give it up.
Why do you think people have been beating the dead horse that is "Give us Australian-based servers" for so many years? Anyone who tells you otherwise is simply happy with their mediocre game experience... and that's perfectly fine, too.
Alternatively, just wait until we finally have fibreoptic in the country. Sure, we'll have to pay a ridiculous amount of cash for decent download quotas for the first few years, but at least we'll be playing at a legitimate 100 - 160ms and not this seedy blizzard alternative.
From what I've heard - I may be wrong, but the fastest you can get is 170ms to the US, because that's supposed to be the speed of light from aus to US.
Distance from Sydney to LA = 15000km. Time for light to travel to LA from Sydney = 50 msec. Time to travel in in fibre optic cable (RI=1.5) = 62.5 msec. Then double that number to take into account the return trip and you have your theoretically best ping. 125ms. Then you have every device in between that may need to relay the packet, and the device at the end that has to receive, interpret and respond to the ping.
So yeah. This guy.