I thought Dave's lyrics were not only appropriate, but actually very well written and touching.
(Although you are kinda mistaken about the term "vibrato" when it comes to vocals. I know that for synth stuff, vibrato is pitch-bending, but that's not the case with the human voice. Or at least, it shouldn't be if it's a good vocalist, hehe. It also does eventually come naturally when a voice has developed, as opposed to deliberate application. In any case, Dave's usage is very modest and fitting. )