Not quite a quarterly update, but:
Switch has sold-through 10 million units worldwide in 9 months. That puts it a few weeks behind the PS4, for perspective. I also think that beats Rol's own prediction for the 2017.
http://www.businesswire.com/news/home/20171212005456/en/
And this thread showed up just a few days before that:
The Switch will still fail
http://gamrconnect.vgchartz.com/thread.php?id=233409&page=1
Bet with bluedawgs: I say Switch will outsell PS4 in 2018, he says PS4 will outsell Switch. He's now permabanned, but the bet will remain in my sig.
NNID: Slarvax - Steam: Slarvax - Friend Code: SW 7885-0552-5988