Have any hard data to support that?
No because nobody will publically admit it...
Attended a trade event in Germany a couple of weeks ago.
Major UK distributor/retailer admitted privately that sales of 'consumer camera drones' since Christmas had "gone into free-fall"...
3DR are effectively giving up on consumer drones, sales of the Solo have been poor.
They've also pulled most of their DIY products.
Which leaves DJI, who are concentrating more on pro/high end consumer.