Eh, that's jumping to conclusions a whole lot.
First, the quote says they talked to Oculus AND Sony and decided on May. Why would you assume it's CV1 when maybe it's actually Morpheus? Maybe both?
Second, while the game may be essentially finished, one thing which is not finished is the SDK's. To be blunt, the current DK2 software/driver situation is... messy. Oculus knows that it sucks, and I'm sure they'll want to push out updates to the community first to make sure they're on the right track and test it. When they release CV1, the experience needs to be smooth as butter (it's for consumers, not developers after all!) and the current experience is far from.
Now, on that point, if I were a betting man, what I would bet is that in March (GDC!) or April Oculus will release the first CV1 compatible SDK (maybe Morpheus launch compatible SDK as well?). The CV1 hardware may not be available except to limited developers, however if you compile your game with the GDC SDK, and test it with DK2 you will know with 99% certainty it will work just fine on CV1 when it releases. The May timeframe would give them ample time after the SDK release to test the game, fix any last minute bugs, and push it out in May.
Finally, assuming you're right and they are releasing in May, that would mean that at this point the hardware is essentially finished and likely starting manufacturing. Don't forget that Oculus has said that the way they will release CV1 is different to how they've released DK2. With the DK's, they essentially ship them as soon as they get them from the factory. This reduces the time it takes for the earliest orders to receive their Rift's meaning they can start developing ASAP, but it makes a lot of people wait since they ship them out in batches. With CV1, what they're going to do is start creating stockpiles early in their distribution centers, so they can have a much more normal product launch of people pre-ordering and actually getting theirs on a release date because Oculus will have stocked up for a while like most other companies do with consumer launches.
CES and then GDC will be very exciting though, and I'm assuming we'll know much more by then.