Its not exactly evidence but many people have learnt to remember their dreams, which is a form of what you said basically I think.
Read these.
http://www.selfhelpmagazine.com/article/remember-dreams
http://www.wikihow.com/Remember-Dreams
and a less professional looking website but still good stuff
http://www.knowledgehound.com/khhow2...ber_dreams.htm
I did all this years ago and it worked for me. I haven't always been able to remember my dreams so well.
edit: also no I don't think so simon, I'm guessing his dreams just went into a lot of detail and he's describing it. I've had dreams that do similar, I find it wierd, as its almost real to be honest. But it is interesting, and I enjoyed reading coqs dreams.
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