Just finished reading the article and have highlighted the key findings below. The 3.3% for total JWs doesn't surprise me as too the 5.33% of JW adults.
The recent 9 August 2016 Australian Census has two interesting questions that when the stats are crunched will reveal the current level of JW education, or lack thereof, for the next generation.
24. Is the person attending a school or any other educational institution.
If you mark yes go to question 25.
25. What type of educational institution is the person attending?
[there is a box that can be marked "University or other higher educational institution."]
Will be interesting to eventually find out how many JWs are currently seeking higher education and what the age groups are. This should be very revealing when compared against the national average, other religions and the below stats from the 2006 census.
As a group Jehovah's Witnesses have the lowest education levels but is there evidence that they are becoming less and less educated? Time will tell. The stats won't lie.