Yeah I’m not ruling it out. Just the speed at which it’s emerging is a bit surprising to me given all the open questions about what “6th gen” is supposed to entail.
I agree, the speed of it emerging is certainly a bit surprising to me as well (though noises seemed to be pointing in that direction in the last year or so).
However I also think if it were to emerge later this year (or even next year for a first flight), it seems it would be a bit odd for them to pursue an "X plane" style aircraft rather than a "YF-22/J-20 sn 2001" type tech demo. The timing feels like it would be a bit late for them to do an X plane type demo and I suspect they would've done that already.
Meanwhile, if they do have a proper J-20 sn 2001 style tech demo, it could just represent an airframe they feel comfortable with for a "6th gen/next gen" role, while the subsystems defining the generation are rolled into the aircraft over successive prototypes and LRIP in future.
Putting it another way, I wouldn't be surprised if the airframe of a 6th gen/next gen aircraft is actually something easier to define and fly and start to demonstrate, while it's the subsystems that will need more time to iterate, test, integrate etc, and those don't need to be part of an initial tech demo airframe.
Big tailless airframe, dorito shaped, good sized weapons bay and plentiful swap-c, and put in the subsystems over successive years, kinda thing.