AAS poster 347.09 --  217th AAS mtg --- We. Jan. 12, 2011:

Title: ``What does Gravitational Lensing Bias mean for JWST and its Deep 
Surveys of the First Light Epoch?''

By: Rogier A. Windhorst (Arizona State Univ.), J. Stuart B. Wyithe
(Univ.  of Melbourne, Australia), Haojing Yan (Ohio State Univ.), Shude
Mao (Jodrell Bank, Manchester University, UK)

Further quotes by Rogier Windhorst (Arizona State University):

``The very distant Universe is literally throwing us an enormous curve-ball 
here that very few saw coming. Only the Webb telescope will have the batting 
average to properly field this one ... '' 
 
``The very distant Universe is thus like a House of Mirrors that you visit at
the State Fair --- there may be fewer direct lines-of-sight to a very distant
object, and their images may reach us more often via a gravitationally-bent
light path. What you see is NOT what you've got!''

``Gravitational lensing bias makes finding these very distant objects like
finding a few needles in the "Mother-of-all-Haystacks". Moreover, Mother
Gravity also hides those needles in the places where the hay is densest!''

``After 20 years and all its Shuttle improvements, this is an area where we
are truly reaching Hubble's limits. But it is great to know that Hubble's
sequel, the James Webb Space Telescope, is designed to penetrate this
mysterious, very distant universe. We need Webb!''

At Hubble's resolution one literally can no longer see the whole "forest for
the trees" at these extreme distances. Only the James Webb  Space Telescope
-- when it gets finished as designed --- will have the exquisite resolution
and sensitivity to disentangle these very distant objects from the foreground
lensing galaxies.''