Why is the transformer Jelly Bean update being staggered geographically? The Transformer TF300's jelly bean update is now available OTA in North America but not in Australia for up to two weeks.

What would be the reason that they would not make it available all at once? Is there some technical reason it can't be done? Like if I was in the US but I bought the tablet in Australia, would it let me update?

So is there any way for me to bypass this restriction and somehow hook into the North American update site (via a proxy or something) in order to get it now?
Each region has its own network-dependent versions (with additional apps / bloatware). 

You can use the firmwares from other regions, which you can find in SamFirmware, but you need to have a rooted phone.