Users waiting for Windows 10’s Creators Update, which is expected to release soon, may need to be patient. Data released Wednesday by AdDuplex suggests that Microsoft’s Windows 10 Anniversary Update took months to roll out to users after it was released last August, and the same pace could apply to the Creators Update. 

In fact, Microsoft said today that the rollout will indeed take place in a phased approach, with newer devices targeted first. Microsoft sources had told PCWorld that the rollout was deliberately slower than with the Anniversary Update, just to be careful.  “We’ll iterate this process over a period of several months until all compatible devices running Windows 10 worldwide are offered the Creators Update,” the company said in a blog post. 

AdDuplex, which runs its own ad network and sniffs the platforms on which its ads deploy, said it took about 4 months for 80 percent of Microsoft’s user base to migrate to the Anniversary Update, once Microsoft started sending it to users on August 2. Just a third of Windows users had received the update after two months, the firm found.

“The Windows 10 Anniversary Update is being rolled out to Windows 10 PCs across the world in phases starting with the newer machines first,” Microsoft said in a blog post officially announcing the Anniversary Update rollout last August.