Ive also noticed this, I had my first audition for a band with people i didnt know 2 weeks ago, i learned all the songs they told me too, some more that i saw they had played from youtube and a go at some of their originals, they were very impressed and i got the part.
But ive emailed other bands and rang texted etc, that have been looking for a bass player, and got nothing, or they have arranged some date and given me songs to learn, and then when i ask were later, no reply.
Its sort of the same idea i think, people want to find someone, but want no hassle of getting to know the person, get along with them, what they really all want is a friend who they can mold. Ive also felt this but have persevered, i hate it and at 16 its difficult to have time wasters as its not only mine but my mum or dads, it piss's me off.