Well in many cases they're copy/paste, in some cases they're wrong (don't include return value) and they take up 5 lines when a single line would do.

`<param name="remoteEpisode">The episode that needs to be downloaded by the transmission client.</param>` every class needs to implement the same thing with slightly different wording, so copy paste and alter, if code was done this way it would be bad design, comments are no different. If remote episode was commented with what it was (its always the same, but the consumption is slightly different) then there is one comment for all the download clients, instead on n comments.