Thanks folks. My line of thinking was running along the same lines - I assumed Moscow was part of Europe but it seemed a stretch to include Ekaterinburg. I guess it makes sense to include it simply because it's a destination no one's going to be using regularly on a RTW and there's no flights further east from there, and easier than splitting off a single city in Russia.

Despite the sticky (I did check there and searched the forum before asking!) I'm still unable to find anything that actually defines where Asia ends and SWP begins... at this point I'd guess the break is that all islands except Singapore are SPW?

All the links in the sticky serfty referenced, that I can find at least, are either dead or don't show the breakout I was hoping to find (eg. AA.com has "Asia" and "OZ + NZ" but no "SWP"). AA.com map also seems to include Indonesia and the Solomon Islands as "Asia" which doesn't seem right. Maybe I'm missing something simple?

Maybe it isn't such a "quick" question after all