For instance, take
http://i17.tinypic.com/4uneoft.jpg
Remove the title, add a mistake or two in the score, and give it to some jazz fan who can read music, he'll recognize the tune instantly, yet nobody ever played it this way, so blandly.
You'll almost never hear any seasoned jazz players refer to a chart like this as a "score", unless they have a very very classical background, or are sort of making a joke about the quality of a particular lead sheet. Scores are for orchestras and films and things like that. It's strange to see people keep referring to these sh*tty transcriptions as 'scores'.
It's like calling Kraft Mac 'n' cheese "pasta". Like, ok maybe technically it could qualify as a pasta, but you don't really refer to it as that in practice.
That is to say, I think you don't give people good enough credit if you think a bad transcription will preclude many from being able to recognize something.
Similarly, a novice butchering a song on guitar is likely completely wrong, but people will still recognize it if the general shape of the song is preserved. Heck, most novice guitars probably are not tuned properly.