Indeed an interesting find. I hate gossip unless it is substantiated by some interesting news and well-aligned like this post is
One possibility that came to my mind at first is that maybe Access is considering creating a new generation of Viruses that move away from the Freescale DSPs and onto an ARM instruction based chip. I have not researched and honestly don't know how these compare in terms of synth-processing capability to the Freescale chips in the Virus, but given the growth in mobile over the last few years, I'm fairly sure the advancements in ARM chips dwarf the capabilities of those old formerly Motorola chips. Many times I've thought to myself that the fact that Freescale doesn't offer anything more powerful could be one of the reasons Kemper isn't moving the product line forward -- nowhere to go if faster chips aren't available (and apparently perfecting the existing integration is either too challenging or just not interesting enough to invest in). Also Kemper cut his programming chops on Motorola chips supposedly, so that combined with the ongoing sales of the current Virus and his interest in modeling amps may be contributing to lack of product refresh.
So, maybe the Ti3 will be an ARM-based beast that does things the DSPs of yesteryear could not. In some ways that would make a lot of sense, the collective developer pool and knowledge base for modern mobile chips is certainly much better than embedded systems for obscure DSPs like Freescale. Much better future for it. I would think the market for devices that use those old Freescale chips is probably shrinking rapidly in the wake of mobile progress, which would mean that Access could be crapping their pants and wondering if these chips will even be available in the future.
Lots of good possibilities, however, let me play devil's advocate for a second. When I put on my recruiter hat (because I often work as a development director and have a lot of experience recruiting developers so I've written these job requirements many times in the past), and I read that requirement, assuming your English translation is accurate, it sounds to me like they just want a general c/c++ developer who has worked on any one of those platforms, and the ARM qualification after Linux is simply to address the fragmented nature of the operating system, and the fact that iOS is sorted as the last platform is an indication that it is lowest in priority. That would tell me that the iOS experience is a nice to have but not directly relevant to the hiring goals -- that would certainly not be the case if they were working on a mobile app, the iPhone/iPad would be their lead platform and Android secondary. So, being a little pessimistic and realistic at the same time I would say this sounds more like a support role to work on Virus control than it does to do OS work on the Virus itself. I fear this may just be looking to supplement the existing Virus Control team, or worst case scenario replace a developer who is leaving.
Like you said though, maybe we will learn something from NAMM. I cross my fingers on that every year. The floorplan shows a booth rental that's the same size they have every year, but of course that means nothing by itself, there could still be a big announcement.