Different line. Maori are Polynesians who arrived in New Zealand sometime around 800 AD in a series of immigration waves.
Sahul was a continent during the Ice Age (when ocean levels were lower). It comprised what today is Australia, New Guinea, and Tasmania (and land in between). New Zealand was not part of Sahul.
I never heard of Sahul either before this story.
Gene mutation may no longer protect certain populations from alcoholism
Since I already knew about that mutation, I find the first link somewhat convincing.