Read the article, temetry wasn't disabled.
If I read the actual article correctly, it was just a Vanilla install of Windows 10 enterprise. There was no active attempt to disable or block any of the actual telemetry features at all. He did go through the customized install and turned off the 'cloud/personalization/sync options there', but that's it.
The actual telemetry features would still have been on.
Not to mention all the usual windows features that phone home:
Everything from windows update, to time sync, to the regular ping it does to see if you have internet connectivity would have still been on.
I'm guessing all the live tiles in his start menu were still on too, so they'd have been pulling ads and updates, etc.
Seriously... it's an interesting exercise and an interesting article about what one's computer is doing. But it doesn't show what anybody here is really concluding.