Did you write this article simply as linkbait, or do you really believe it?
Given that people look at Facebook statuses as a mere extension of a user's profile, versus a Twitter timeline actually serving as your profile, simply distributing your Facebook status on a web page isn't going to phase Twitter one bit.
And I still stand by what I said earier: Facebook and Twitter users aren't the same. Mark might update his status on Facebook "Mark is at the ball game" but on Twitter, he'll probably say "Local sports team is up by 4! Go team!". The inherent purpose and utilitarian value of the two sites are completely different for one to arbitrarily overthrow the other, just because the one (Facebook) mimics the distribution of the other (Twitter)
That is why Facebook can't easily kill Twitter.
With Twitter, I don't have to waste my time ignoring the latest Knighthood Invitation or the Group Created to Get Enough People in the Group to Advance Cause X w/ No Substantive Effort Invitation.
This is the important point. Facebook will never be as succinct as Twitter. Facebook will never fit in the palm of your hand the way Twitter does. I use Twitter-Facebook integration. No one comments on my tweets in Facebook.
No it wouldn't.
I'll say this as simply as I can for anyone who ever plans on saying how Facebook will kill/destroy/et al Twitter: Don't. Facebook and Twitter cater to complete different tastes of two almost entirely different audiences.