Reckon last summer's season down here probably has dented the popularity of the game. The ugliness and shenanigans hurt the standing of the game and would have turned some people off. The perception, accurate or not, that Harbhajan "got away" with unacceptable behaviour because the Indian board "own the game" has probably soured some people on it as well. The other factor is that there's a certain level of bogan blokiness and over-competitiveness associated with the current team and that probably puts people, particularly women, off the game.
It think what the survey doesn't show there is any kind of weighting for the level of interest taken by people - if that was factored in then domestic footy (as in AFL or League) would beat tennis and cricket hands down, but instead reflects what number of people took an interest. The Australian Open (tennis) is pretty well placed in an otherwise empty part of the sporting calender and most people take some interest, but outside of that, and Wimbledon, and to a hugely lesser extent the other two grand slams the number of people who actively follow tennis or watch any would be pretty low IMO. Taking that kind of factor into account, cricket would IMO be more popular than tennis still.
In terms of numbers of people playing socially, it would not surprise me if tennis was as popular if not more popular than cricket - but in that metric, netball smashes most of the other sports.