I don't agree with the quote and I understand what CarCal is saying.
Moreover, the quote is contradictory because Britney was professional during the making of
Blackout.
She organized the studio session, choose to work with Danja alone instead of the overrused Timbaland (the best decision of her career) and executively produced the best mainstream pop album of the decade...

And we can't ignore Danja and Keri Hilson numerous statements about how she was the most efficient and fastest person they ever worked with.