Good comment Flora, and point well taken! My experience is actually almost exactly the same---I could've written what you wrote. Ive mentioned it on this board before--that there is definitely real psychic ability in some people, but how it manifests is so unfocused and random---and we are amazed when quirky things are picked up--as a dead-on match, out of nowhere.
I think expecting on-demand, specific, psychic reading accuracy is a pipe dream.
To be honest thats why I think readers like Skye at CP, who seems to be all over the place are authentic psychics. And when she comes up with a startling prediction or information match, it is indeed amazing.
On the other hand, readers that give us fully fleshed out stories, scenarios with details, are likely creating imaginary stuff, based a lot on what we tell them, what our voices sounds like, etc. Maybe with some natural intuition or wee psychic talent.