In my experience this redirection only happens when you type google.com (which is, of course, what an American would do). If I type in google.co.uk then, no matter where I am in the world, I get taken to the .uk site. Same when I type google.de (i.e., I get taken to the German site)

I wonder if typing google.us would take you to the US version of Google? (You do have a country code - lots of people don't realise this!)