It's in the Netherlands, the world's centre of telecommunication connections.
LA servers are the same low speed, even Australia. I only get 20mbps+ within NZ.
Depends on your definition of center. Most people see USA as the center.
You should be able to get 20mbit+ from Aussie easily.
I would discuss with the helpdesk around packet loss problems, as a small amount of packet loss (like on Wifi etc) could result in OK national speeds and slow international. This is due to the way TCP retransmissions work.
Looking at your Usage (1TB+) I would recommend making sure when you do these speedtests that nothing else is running (bittorrent etc). As these will cause overseas speedtests to look low.
London-Paris-Rotterdam industrial triangle is the centre. :-)
And no worries, Iknow how toperform a fair speedtest, and I don't even use P2P, just html and ftp.