That's an excellent point; though I would counter that in the case of Pink Floyd the "vocals" are samples, and in Anesthesia the voice comes before the song starts (like an artifact from the recording process). Finally, in neither case are lyrics credited in the album sleeve. Again, I understand that this seems to be nit picking; I just feel it's important to note that the band chose to include lyrics credited to their recently dead band mate in what would have otherwise been a instrumental. I think the way it's written now looks great and is, again, a good compromise. Someone else please share their thoughts on that.