You be the judge. Nadja (PolePositionMgm) appears, from reading her tweets, to be Joanna’s Manager. Read through her updates. She just posted this:
We could have told her that Derek is absolutely amazing, right?? 
And that he dances like NO ONE’s business.
Yes, I have good timing.
What a great compliment. He is an amazing dancer indeed!
[...] We’ve been reading a lot of things that have made us think that Derek Hough and Joanna Krupa were going to be partners. Heidi’s been telling me it for a day or so now. However, the leaks have gotten stronger today. Pure Derek Hough has a tweet from Pole Position Management about Joanna and Derek as partners. [...]