I'll prove that I can read, by posting a link to this thing that I read:
Windows 10 Design: Getting the balance right
And I'll draw your attention to this part:
[Begin quoted section]
People aren’t squares
We’ve also heard that using circles to represent people doesn’t reflect our overall design and feels out of sync with what we’ve done in the past.
I’m going to segue a bit into some of our design thinking here, but stay with me for a bit….We did a lot of thinking about this during our planning stages for Windows 10, and what we tried to accomplish was to help the people in your life really stand out visually. This is particularly important in experiences like Start, and when you’re moving through different apps where there are people mixed with other content types.
So for now, we’re going to stick with using circles to represent people, and we hope we’ll hear that you enjoy how easy it is to spot a friend when you’re glancing through all the things you do on your phone.
[End quoted section]