Could preparing too hard for Chess960 make you weaker at....

[pichy]

I found out that GM Hikaru Nakamura is preparing very hard for the Chess960 World Championship at Mainz from friends that knows him very well. Could it be that preparing for chess960 which is very wild made him weaker at normal chess

http://www.chessbase.com/newsdetail.asp?newsid=5362

[Matthias Gemuh]

I found out that GM Hikaru Nakamura is preparing very hard for the Chess960 World Championship at Mainz from friends that knows him very well. Could it be that preparing for chess960 which is very wild made him weaker at normal chess

http://www.chessbase.com/newsdetail.asp?newsid=5362

At GM level, any "distraction" from standard chess has consequences.
At my level, there's no difference.

But wait ... GM = "Gemuh Matthias"