New research from Slice Intelligence this week suggests that 22 percent of the Apple Watch preorders placed on or around April 10—the first day Apple began accepting orders—were delivered over the weekend.

“Most people who preordered an Apple Watch did not receive one in the first wave of shipments, with Slice Intelligence reporting that only 376,000 of the 1.7 million Apple Watches ordered were delivered to U.S. consumers this weekend,” Slice said in a recent blog post. Slice said it expects the next wave of the 1.7 million Apple Watch units, or 547,000 of them, to arrive on doorsteps between April 27 and June 11.

Slice’s report is based on data from 2 million shoppers, the company said, and noted that it gets its data from electronic receipts sent to consumers. Unfortunately, the company didn’t discuss which models and band combinations were shipping ahead of others.