I agree regarding the character of demos, but disagree regarding your last statement. A demo can show you what type of music the person is comfortable playing, and if its a live demo (youtube for example), what they are like in a live situation. Sure, the person can cherrypick to put up only their best work, but its something, at least.
I've wasted so much time on people who 'said' they could play xxxxxx songs, only to find that their style or actual ability did not mesh with mine at all. Or the guy who really 'just wanted to jam'. The guy who showed up for an audition with no guitar. The guy who showed up with an electric guitar (after I told him acoustic only). And the converse is true too - if they check out my studio work or live videos, they can tell if I'm right for what they're looking for.
I've wasted so much time on people who 'said' they could play xxxxxx songs, only to find that their style or actual ability did not mesh with mine at all. Or the guy who really 'just wanted to jam'. The guy who showed up for an audition with no guitar. The guy who showed up with an electric guitar (after I told him acoustic only). And the converse is true too - if they check out my studio work or live videos, they can tell if I'm right for what they're looking for.
My reverbnation site: http://www.reverbnation.com/mikebirchmusic
Youtube: http://www.youtube.com/mikebirchmusic
Facebook: http://www.facebook.com/mikebirchmusic
Youtube: http://www.youtube.com/mikebirchmusic
Facebook: http://www.facebook.com/mikebirchmusic