Miami is slow when using Sana-II drivers, I have never heared a technical description...hence the existence of MNI (Miami native drivers)
If you want fast and SanaII ... use AmiTCP
I could make some tests but here is what I did on the show floor in AmiWest:
Wireless 802.11b <> Mac 1GHz G4 Tibook Airport <> Pegasos G3-600 100Mb/s ethernet on MiamiDx 1.0c using via_rhine.device
I copied 2 x 700MB files over this LAN link between the Mac and Pega at a max rate of around 1.25Mb/s accoring to Miami stats....this was using JIT.
Of cours...direct to the internet speeds were limited by wireless bandwidth.
I could make the same measurement using non-JIT if someone really cares to see the result.
Steve