Different question, different answer?

Very soon the results will be released from the 2016 Census. One of the usual talking points is the shrinking of the number of Australians who identify with Christianity.

But this time the question has changed. Or more precisely, the answers choice has changed.

As "No religion" has become more popular over the years, the Census decided to move it to the top of the list of options.

How much will this affect the results? What will people tick? In particular the people who were raised in a Christian denomination but have little to do with it these days.

In the past they may have ticked 'Anglican' for example and moved on to the next question, without reading down the list to find "No religion". Now it's at the top of the list, how many will now tick that option instead?

I guess what I'm asking is how much of the change this time will be due to people who have not changed their views but just ticked a more convenient box. And how much will be due to people who have actually left religion?

It will be interesting to see the results.