Looks like drobe got confused over the warranty thing but the other points seem to stand.
Who says A6 will be quicker? Anyone? Also, it has been said that only a small percentage of Iyonixs hare affected by the problems so I wouldn't expect all of them to be going back today to get fixed by CTL. Say it were as many as 1 in 5, that'd mean a maximum waiting time of little over 3 weeks *if* all the machines were sent back at once. But, in the end, this speculation is pointless.
Iyonix users, phone CTL and ask for an estimate on how long the work will take. Hell, and why not phone A6 while you are at it and see what they say.