There was an issue with the screen, so I took it to Samsung in Melbourne Central. They confirmed the issue and were happy to do an on the spot replacement if Telstra didn't have any left in their nearby store - for admin reasons it was just a bit better to do that.
Telstra didn't, so I took Samsung up on their offer - very happy to have it resolved straight away. None of the BS as in the GP post with Apple.
However as a combined service center / sales outlet they had a policy to replace DOA units as long as it was a genuine Australian, non grey import.
To be honest they just appear genuinely interested in looking after their customers and were just as excited as myself about the new release.
I had a USB port issue with the S6 Edge phone prior to my S8+ and the was also resolved quickly by a repair, ended up being on the day with a free loaner.
Service like that has pretty much guaranteed I'll stay with Samsung products for the foreseeable future (I upgrade every two years).