Ken
I was interested in your comments to Constantinos. You seem to be saying he may be wrong ref the delay. In fibre optics the delay is established with great accuracy as polarisation mode dispersal (PMD) delay, somewhat frequency and polarity dependent (birefringence) but fully consistent with that Constantinos derives. This is the 'charging' or 'momentum' delay of scattering.
Also consistent with this and of topical interest are the latest results reported in Science vol 331,p892, and p 16 of 26th Feb NS, where particles were charged and 'bounced off', or were re-emitted by, the fine structure ABOVE the surface of matter, (done here with coated glass). This is equivalent to reflective scattering. The 19th Feb NS (p18) showing plasmons 'grabbing photons' through a nano hole and re-emitting them, when an 'empty' hole won't let then through at all! All equivalent to QED, with electrons 're-emitting' photons, and always at the relative 'c' of the electrons if in a refractive medium co-moving wrt an incident medium. And we find the greater the relative motion the higher the 'fine structure' surface plasma or 'plasmasphere'. Is that purely a co-incidence? The discrete field model (DFM) explores the implications if not. It's consistent with Constantinos and Edwins, and we haven't been able to falsify it yet.
You ask about "how to get quantum behavior to emerge from classical fields". It it worth considering the converse; How to get classic relativity to emerge from quantum behaviour. With refractive dispersion this seems to emerge naturally.
Food for thought?
Best wishes
Peter