From Jeff Cable, Team USA Olympic photographer (link), who has shot the past 7 Olympics:

Now, for those of you who are into photography and cameras, let me tell you about the Canon R1. The focus on this camera is absolutely AMAZING! In past Olympics, my take rate when photographing gymnastics was maybe 40% in perfect focus. With the Canon R1 I have a 95% take rate. This is crazy! And at 30 fps I ended up with more than 5,000 images to choose from. Trying to select my favorites was daunting!! When this camera locks in, it holds. And it locks in so fast that when I hit the focus button with the gymnast in mid air, it still locks on their face perfectly. This is a game changer.