Telepathy would be better
Considering that the Facebook plugin doesn't work properly on more than half the sites that use it, telepathy would probably be better. It's so bad, I've pretty much stopped commenting on sites that use Facebook. You can leave a comment, it appears to have posted, then log out of Facebook and reload the page and the comment doesn't show; or, you can try to post a comment, but when you hit the Enter key to submit it, nothing happens. Others have complained that they can leave a comment, but they can't share it with their Facebook friends. Give me Disqus or LiveFyre, but if you use Facebook, I'll just move along to a different site.
Facebook has been around long enough and has enough financial resources that such technical problems should have been worked out years ago. The fact that the problems persist year after year tells me it is junk software, like Macromedia Flash, which became Adobe Flash, the latter still being buggy and a security risk after 20 years of tinkering.