Slice Intelligence, which earlier estimated first-day US Apple Watch pre-orders at just under a million, said that the number has now reached 1.7M, and that 376,000 of them have shipped – around 22% of pre-orders. KGI has estimated worldwide shipments of 631,000 in Q1, with Q2 shipments expected to hit 3.8M.

Slice gathers its data by scanning the email inboxes of more than two million participating online shoppers and extrapolating its numbers from there. Of those panel members who ordered an Apple Watch, 22% of them were given a shipping date of Friday to Sunday inclusive …

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