Nah I don't believe that publisher matter a lot, if id want's to make port to linux they don't ad it with game-dvds. They just make a downloadable linux-binary installer on ftp site where you need data paks from game-dvd. For game servers there will absolutely come linux dedicated binaries.
Believe what you want. The publisher, depending on the contract done, can have a MAJOR impact on what happens. Moreover, game servers do not Linux gaming make. If it's without a native Linux client binary, you probably shouldn't be looking at it.