See this thread, in which the same question was discussed. The bottom line, IMO: Yes, it is quite plausible, and is even expectable depending on the media and the player. The quotes contained in my post that is linked to in that thread present several reasons, involving interactions that can occur between the mechanisms that track and read the disk and other parts of the player, resulting in jitter and noise issues.
Regards,
-- Al
Regards,
-- Al