Would you drop a Facebook friend under these circumstances (details inside)?

I have a friend whom I’ve only known as the other half of a committed couple. Things seemed to be going very well in their relationship (I won’t describe details because I don’t want to identify them.) Then, out of the blue, they broke up a few months ago. Just recently, this friend has another lover and is wasting no time bragging about how wonderful the lover is. Meanwhile, this friend and the ex are on FB, and I read their status updates all the time. The ex isn’t writing anything fantastic, just normal day-to-day stuff. There are a lot of mutual friends in the entire dynamic.

I think what the friend is doing, by constantly updating about the fabulous new love, is not at all considerate to the ex (they are still mutual friends on FB) and is just plain rude. Even if the ex is okay with it, it hurts to watch the whole thing unfold. I’m becoming really disappointed in this friend’s behavior. But, I’m hoping it’s just temporary—the side-effects of a new love.

Thoughts?