Thanks for the link. Based on their promotional video, there are two things I didn't realize.
1. Even though there are multiple reactions, they're counted in aggregate. So instead of see 6 smilies, 2 sadfaces, and 1 like, you'll see 9 interactions were given.
2. The most recent 3 reactions are shown. There's no way of telling who reacted in which way, and the reaction break down.
3. I was completely wrong with points 1 and 2. After testing out the feature, it's trivial to see the reaction breakdown by either hovering over the reaction counts, or by clicking it.
Realizing the hardest part of this change for me is that I have no idea how to refer to the "reaction counts". Should I say, "Hey, your video had so many reactions!"? I guess I'll have to feel it out. Sort of starting to feel that this was a strategic move by FB to capture any new "like" type interaction that a competitor tries to release. Github has stars, Twitter now has hearts, FB has always been likes, but soon can/will be everything.
EDIT: Realized that reactions don't work in comments.