[Slowhand] Solo in unplugged Layla

[crocketo at vip.cybercity.dk]

Hi all.

Thought I'd start a little debate.

I've just downloaded the MVR Acoustic Waltz mach 2. And yet again found 
myself wondering wether the solo in Layla is pure improvisation or 
rehearsed. although it is one the most perfectly acoustically engineered 
soli, I'm still in doubt. 

Anyone got any input on this matter?

Cheers
Kristian (Denmark)