I've been working on a theory, and am integrating it into an adventure I'm creating. In essence, it makes no sense for Technomancers to have recently evolved - technology moves too quickly for evolution to keep up (in just two generations of humans the Matrix has been reinvented - twice!). So the only sensible thing is that technology is moving the other way.
In other words, the otaku and the technomancers haven't Emerged to deal with the Matrix, the Matrix has been changing and (possibly intentionally, possibly as a side effect) is becoming easier for humans to access. The otaku started appearing sometime after the first Crash (and rebuild of the Matrix), and when they rebuilt the Matrix again, what do you know? Technomancers.
My hypothesis (and the heart of my adventure) is this: That technomancers have existed all along, and that some entities, likely NeoNET's precursors, have been experimenting on them since long before we knew they existed. The research led them to discover a new way to build Wifi devices, but there wasn't much of a market for an already Matrix-saturated world. What's a megacorp to do?
Via Shadowrunners, engineer the Crash 2.0, that's what. I'm not saying that Deus and all of them weren't involved, but they were pawns of Transys and/or Erika. So the new wifi technology, developed from the minds of technomancers-to-be, spread like wildfire as the megacorp rebuilt the Matrix. And so now technomancers, who had previously had little to no powers, were suddenly able to access all of this technology. The Crash didn't change them, the Crash changed the Matrix, and now they could see it.
Well, the Crash DID change some of them, of course. AIPS was a real thing. But I don't think it gave them the Resonance; it just made them more susceptible to it or more likely to notice it.
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So, the reason I'm posting this on the forums is this: is there hard evidence in any of the sourcebooks to counter this theory? I've read the core book, Unwired (specifically its section on technomancers), and most of the Emergence adventure, and it all seems consistent with this theory to me so far. And what a story uncovering this conspiracy could turn out to be!
(Edit: oops, put the wrong company for the pre-NeoNET conspiring)