http://newrockstarphilosophy.com/2009/03/24/music-meaning-vs-entertainment/
my reply to this post:

fantastic blog and the dylan comment made me laugh.
yes, he's hard to understand since about 20 years ago.
maybe he does that on purpose as i'm sure he can sing better than that.
his radio show "theme time radio hour" is sensational though
his voice is melodic and lyrical butter thoroughly

myself, i use bob dylan, mark knopfler as evidence that meaning and storytelling can be much more significant than vocals
most of the x factor karoke crew have good voices yet are pointless
the beatles maybe the answer to this
mccartney had/has a better voice than lennon
although his lyrics weren't as mind blowing