I give it a week before other scientists call bullshit.
I see it as something they wanted to prove and did to themselves and anybody else who wants to believe their results or just their word.
Entanglement is related to particles from the same event. 1&2 are entangled as are 3&4.
1&4 were considered entangled by their use of "projective measurement" on 2&3
"projective measurement" = Although quantum mechanics has held up to rigorous and thorough experimental testing,
many of these experiments are open to different interpretations
linked from http://en.wikipedia.org/wiki/POVM defining "projective measurement" (first paragraph).
So they have their interpretation, I have mine (didn't happen), and we're all happy.
About me: A two years of chemistry ex-student who does a lot of reading on quantum physics. Yet nobody to talk on the subject, so more reading.
Not trying to solicit anybody just saying nobody I know, knows much on the subject to bounce thoughts off of.