It's a sign of our times. Indian English follows more or less the British pattern (colour instead of color etc.). However, recent times have seen a marked shift towards American spellings and pronunciation. I would imagine this is the case in other former British colonies as well.
Oh, I understand why it is, but it doesn't stop me complaining :-)
I'm starting to feel some sympathy with the Academie Francaise [1]. At least the US English <--> British English traffic in terms of idioms isn't all one way [2]
