Sorry, that was worded terribly. I meant is part of what you know information about what within the dev kits is changing/has changed? I would say that you analysis is accurate in regards to release time-frames if we're going by the Wii's cycle, though.
I've gotten indications that this is a "real" change and not tweaks like lherre mentioned for the other kits. If you are asking about specifics, I've gotten nothing in that regard.