If Cirrus hasn't been able to give manufacturers any hardware with which to use in development, I still have a hard time seeing manufacturers being able to deliver any well-tested products to consumers before late summer. I'd think (hope) that Cirrus has had some sort of SDK or other reference material available to manufacturers for some time now, but even without the lengthy delays in getting the chip out Cirrus's door I wouldn't expect anyone to have been able to develop solid production-ready firmware from such material alone, meaning there's likely to be a fair bit of work to be done once those chips arrive and real world testing can commence. If companies start trying to wrap up development of multiple products in their next gen all at once and get those products into production at once, resources are likely going to create a staggered release sequence: get one done first, use experience from that to speed completion of the next, and so on. It'd be similar to what Onkyo did last summer with the x05 series of receivers.

That late summer date may prove to be pessimistic of me, but personal experience in engineering says to respect Murphy's law - as such, it actually feels a little optimistic...