Yes, apparently so. But they aren't the only extreme metal practitioners to come from the land of sheep...
Doom Cult is a group of NZ bands playing death metal, blackened death metal, and black metal. Pretty decent stuff really. Diocletian seems to be the leading band, and their members actually play in the other groups too (namely the other two groups here). Michael Hoggard of Ulcerate also plays guitar for Vassafor live.
Diocletian - Doom Cult
Diocletian - Decimator
Witchrist - Curses of Annihilation
Vassafor - Vassafor EP
Unfortunately the Doom Cult website is down at the moment for some reason, not sure what's going on there, but you can find some of this stuff at Invictus Productions.