It would be surprisingly low for anywhere but here. For me, it was actually surprisingly high. BT will upgrade eventually but we're always behind the times. Our last upgrade was 'out-of-date' before they'd even finished putting the wiring in. We don't even get a brilliant mobile signal so mobile broadband isn't an option for many people either.
Despite this, our updates are always relatively quick. The only time that an update of a few megabytes took longer than a few seconds was when we had a line fault. Game downloads are also very quick compared to something of a similar size on the PC or Playstation 3.