There is some useful information listed here for those looking to spot the general trend.
http://whirlpool.net.au/survey/2007/The Australian Broadband Survey for 2007 was conducted over a four week period — from 31 December 2007 to 1 February 2008, during which the survey was successfully completed and verified a total of 17,881 times.
As this was an open survey, we have been extremely rigourous about maintaining data integrity. Therefore we have only considered submissions that had been validated, and have also carefully eliminated any instances of ballot stuffing which might have occurred.