Yes, David, he said 1.5 to 2 weeks and that he would post about the whole process on his website once he knew more.
This is going to present another possible upgrade opportunity: to replace hook up wire while driver is being upgraded. Wire is apparently connected to drivers via banana plugs which should make replacement a little easier. But of course how would one determine how much of the upgrade was due to new hookup wire or new "cones"? At any rate I'm holding my horses until Srajan weighs in. Also, sent him an email to remind him there are a bunch of us Nen owners eagerly awaiting his verdict on the new drivers and thanking him for his review of the IFI pro iDSD Signature which arrives today for a 60 day home trial via Music Direct.