It is a long way from PnP. DSLRs aren't PCs and that sensor isn't plugging into a USB bus.
I certainly didn't mean literally PnP. What I meant was that I think it's unlikely that they can lock down all the specs of the individual components a year or more in advance so that each component group (sensor, firmware, AF, physical controls, body) can have exact specs to work toward.
Consider that the production line will need to be setup, inventory needs to be ordered, etc.
You can't start writing the software until you know what the hardware platform (i.e CPU) that you are targeting is known.
It seems much more likely that they'll tell the component teams "we'd like to have the option for 12fps if we can, but we *really* want 10fps." That tells the teams working on the hardware and firmware what to shoot for, and what management is willing to spend in development time, component cost, etc. At some point they'll start converging on the component set that marketing thinks is best suited to the market environment and target price.
No, it doesn't work like that. There will be performance goals, sure, but they need to be delivered upon much earlier. Consider that the camera needs to go through a testing phase to ensure that it won't melt or otherwise self destruct as a result of the owner using it in (say) Death Valley in the middle of a summer's day at maximum fps.