In article , Steve Willner
writes:

The two relevant preprints seems to be the ones at
http://arxiv.org/abs/1205.3788
http://arxiv.org/abs/1205.3787

In article ,
jacob navia writes:
1) A cluster of 2.6 x 10^14 M0 in 3.7 GY is nothing special.

More like 4 to 5E14 Msun at z=1.75. There shouldn't be many such
clusters in the sky, but there should be a few. If a lot more are
discovered, something is going to have to change, but it will take
more than a single object to force changes.

One needs to interpret such rare objects properly. See recent work by
Ian Harrison and Peter Coles on extreme-value statistics in cosmology:

http://telescoper.wordpress.com/2011...-the-universe/

There is a real problem, however, with the 775 nm magnitude of the
lensed source. Even with lensing, it's too bright for the population
of known z3 objects. It's going to be very interesting to see how
this plays out.

Yes. It might be improbable. However, improbable does not mean
impossible.

How probable is it that the Moon and the Sun have the same angular size?
Doesn't this low probability question the entire big-bang paradigm? :-)