GtW,
I think that what Batninth means is that a USB "modem" works just fine and without problems 99% of the times that it is deployed, rather than 99% of broadband connections are via USB "modem".
That is my reading of the post, at any rate.
I would agree with you that some form of shared access device accounts for a very large number of broadband installations, although I have no stats other than my personal experience!
SD