[plain talk]

I am no phyicist but I know that neither you or I know the structure of this so called singularity and whether IT was homogenous or not at a sub-atomic level prior to the big bang. The concept of the big bang producing an explosion where matter was not spread uniformly is perfectly consistent with what we have observed and makes complete sense. The particles flying out of the big bang explosion could have had different velcoities so that any initial uniformity quickly degraded into non-uniformity etc Not sure why you are homing in on this particular point anyway.

[AndrewC]

The particles flying out of the big bang explosion could have had different velcoities so that any initial uniformity quickly degraded into non-uniformity

You both might want to read the following Inflation for Beginners. It addresses the complexity/uniformity problem.

excerpt: The theory said that inflation should have left behind an expanded version of these fluctuations, in the form of irregularities in the distribution of matter and energy in the Universe. These density perturbations would have left an imprint on the background radiation at the time matter and radiation decoupled (about 300,000 years after the Big Bang), producing exactly the kind of nonuniformity in the background radiation that has now been seen, initially by COBE and later by other instruments. After decoupling, the density fluctuations grew to become the large scale structure of the Universe revealed today by the distribution of galaxies. This means that the COBE observations are actually giving us information about what was happening in the Universe when it was less than 10^-20 of a second old.

No other theory can explain both why the Universe is so uniform overall, and yet contains exactly the kind of "ripples" represented by the distribution of galaxies through space and by the variations in the background radiation.