This is according to DigiTimes, which is a popular website/newspaper from Taiwan (they claim it reaches 100k professionals). It seems that the source of this news is Nikon, since they mentioned "according to the company" in their article. Of course the term "mirrorless DSLR" is not technically correct:
"Japan-based camera brand Nikon expects its new mirrorless DSLR-similar camera will help expand its market share in the interchangeable-lens camera (ILC) market in the Asia Pacific to 40% in 2011 and 50% in 2012, according to the company."
The article is called "Nikon to enter mirrorless DSLR camera market".