Malenac....surely, you jest whistle

I will agree with you that a number of lyrics posted on the lyric boards are poetry... and some composers like me would have a hard time putting them to music.
Truth is, a short while ago, we did have someone who was pretty much strictly a poet. and reading his poetry...it was clear to many that he had not written what we "generally" think of as lyrics. NOT that you couldn't have put them to music. after all, it does depend on styles, genres... all that.
I have found that some lyricists do write with considerable rhythm in their words. Almost always, if you take those lyrics and say them aloud...the rhythm and floe are pretty apparant.
Some (as we say on the lyric board) practically sing themselves.

I have a bit of a problem calling a lyric "a song" as some lyricists do... but I certainly have no problem whatsoever calling what they have written ... a lyric.