True. There were several interviews (in Russian) explaining that. It took me 10 minutes to dig two of them:
http://fanzone.khl.ru/news/14402/
Q: You came over (to Russia) as center, but were moved to left wing. Alexey Kaluzny (Omsk's top center) explained that as centers have different roles at czechia and russia.
A: Never (in my career) I was coming back (to defend in my own zone). I was technically playing center, was taking faceoffs, but on defensive zone I was at left wing position. That's pretty much the way I play here (at KHL), except for I'm not taking draws. Initially Summanen (Omsk's coach) made me center, but me and Kaluzny decided it would be better for me to play left wing and Summanen didn't mind it.
http://www.peoples.ru/sport/hockey/roman_cervenka/
Q: Roman, you are versatile forward, aren't you?
A: Well, I used to be center.
Q: Why it didn't work out at KHL?
A: At KHL centers have to play defense. I never did. So wing is better for me.