The NAPLAN does test to find the gaps... I know of a school that got extra funding and help to fix the problems they had in English... they have a larger number of non English speaking families in their catchment area and the test showed they needed extra assistance. 

We should not put our kids under pressure.. it should be just another day. And schools should be thankful for the gaps to be found out... it will give them more money to assist where they are lacking.