It looks like a number of Australian players have been incorrectly placed onto US servers whilst trying to play the PC version of Overwatch. Normally that wouldn't be a huge issue, but as we're talking about a ping increase from ~40ms to ~200ms, that could mean the difference between the Hanzo we know and love from the cinematic animated short to one that fires arrows like that one Orc archer in Lord of the Rings that couldn't hit Frodo who was just sitting there crying about Gandalf as he fell into that giant pit with the Balrog. Ahem.

Blizzard, who are aware of the issue, has responded with the following.

Hey everyone,

Thanks so much for the reports. After really digging into this over the weekend, we’ve been able to confirm that there is indeed an issue preventing some players in the Americas region from being matched into local servers — specifically those near/around Singapore, Australia, New Zealand, and Brazil. This is currently only affecting PC players (our local servers for PlayStation 4 and Xbox One appear to be working fine) and, while we don’t yet know why this is happening, we can see that the problem became much more noticeable last Thursday.

We’re still investigating possible causes, so we don’t have a solid ETA on when everything will get back to normal. Unfortunately, it’s unlikely we’ll be able to identify the bug and implement a permanent solution this week, but we’ll be trying out some things over the next few days that may improve your experience for a short time. This would only be a temporary band-aid, though; our biggest priority is to find a fix that addresses the problem at its source.

We’re super sorry for the inconvenience, and we’ll be sure to update everyone as soon as we make any sort of major progress. Thanks again for letting us know something was wrong, and most of all for your continued support.

The fact that it's being looked into is a plus. In the meantime if this is affecting your Overwatch sessions, play as Mercy or Lucio. Because a), people will love the heals, and b), you don't need to be 'Bradley Cooper is The American Sniper' to feel like you're contributing to your team.