[renormalised (Carl)]

The problems with these surveys is that they are too narrow in their focus to really be of any use, except on the scales they observe them at. If you're going to resolve any question about the Universe having some sort of rotational symmetry and a bias in handedness of the rotation of galaxies due to this, you'll need much larger and more widespread surveys to be carried out. If the rotational asymmetry of the galaxies is present now, it should be present in the past and even more so. The reason being is the conservation of angular momentum. The early universe must have been spinning faster than now, and if the present angular rotational rate affects the galaxies handedness now, how much more would it have affected it back then. The asymmetry would've been more pronounced. So, we really have to look back to at least z=1 (8Gly) and possibly as far back as at least z=2 or 3, to get a good idea of what's going on. That means sampling at the very least 5-10 million galaxies. Mind you, these galaxies should ideally be observed from every direction, so we get no bias in the direction of the observations being made.

Only going back to <0.085 (<1.34Gly) is virtually looking in our backyard for evidence of something that's happening 2 blocks down the street. At z=0.3 (3.5Gly), it marginally better. At least you're looking at the closest backyard in one of those blocks.