Well, by average, I mean people who are not involved in some deep research, discussions, who do not seek for some music critics magazines etc... People listen to what they like and there is a music that is generally liked and music that is not.
For my taste, the first ever contest here was the most quality on average; but later there always were some standout songs.
I mean, I could go on and make the list of songs from each country that would "deserve" my 12 points. And I can bet I wouldn't fit into the majority.
Still, I think language shouldn't be a barrier and isn't a major barrier in these contests. I guess, non-English speaking countries simply "fail" to nominate the sound that can get into other players heads enough. Or to fit in the median.