It seems to be that way in much of the world - I don't have much knowledge on the topic outside of the UK, but a month or so ago when I was waiting for the new Blackberry OS update to roll out, I had to wait over a month for my network to approve it and send out the update (Vodafone UK), so I kept an eye on stories about the update and saw that it was reaching different networks around the world at different times (for example, Vodafone hadn't put it out to their customers in any other regions either, such as Australia).