Everything about that article and the reply isn't really disputing it, he just talks about something else.
From the article:
Cook's comments followed a report on Monday from technology research firm IDC estimating that the tech giant sold 1.1 million units of the Apple Watch during the third quarter of 2016, down 71 percent from the year-ago quarter.
http://www.reuters.com/article/us-apple-watch-idUSKBN13V0BT