interesting as that assumes that every performance gives at least a bit of joy to the audience 

Ok, I'll rate each and every performance I saw during the entire weekend...
 
... which of course was absolutely nothing.  I excelled myself this year by not even noticing a single second of music.
 
I could rate all the forumers I met though, out of 10???  *insert a mischievous wink thing*

▲


interesting as that assumes that every performance gives at least a bit of joy to the audience 

 
Not joy to the audience, only to me. Everyone else could be emotionless automatons that are only imitating emotions for all I am able to conclusively prove.
 
On my exponential rating system all bands produce at least e¹ joy (x), but it can be countered by other factors such as anger (y), melancholy (z), sarcasm (a), volume (b), arousal (c), how comfortable my shoes are (f), etc. Which obviously means that a band would have to excrete a lot of joy to compensate for a pair of 4 inch heels. As the rating is only on one axis here I chose joy.
 
Sometimes I worry that my brain is broken... but no, reading that back it all seems reasonable.

Spudman, I'm hoping you're a maths teacher gradually letting go for the long holiday?
My results are in- sadly no A*s, but....
Thurs;
Futureshorts 7
Guillemots 6.5
Fri;
The Trip Q&A 8.5 (heat/meltdown lost them a point)
Yann Tiersen 6.5
KT Tunstall 7
Bright Eyes 8.5 (why was I surprised at this?)
The Vaccines 9
Bombay Bicycle Club 7
Sat;
NMTB 9
Adam Ant 11 (hence no A*)
They Might Be Giants 9
Omid Djalili 6
Paula Nutella 7
Waterproofs 9.5
Sun;
Scala 5
The Leisure Society 8
Dylan Moran 18 (he scorns your confines)
OMD 9.5
Lykke Li 8.5
Eels 10 (perfect)
The bit of the underside of the car that fell off this week after the mud battered it 1.5
The loo cleaners 10

Thurs:
Guillemots/Oldboy: 4
 
Fri:
Braids: 7.5
Edwyn Collins: 6.5
Chapel Club: 7
Campbell and Lanegan: 5
Crocodiles: 5
Still Corners: 6
Bright Eyes: 8.5
Glasser: 6.5
The National: 10
Promising start, dissapointingly ropey middle, awesome finish.
 
Sat:
Phildel: 7
Villagers: 7.5
The Walkmen: 8.5
British Sea Power: 8
Seasick Steve: 5 (abandoned for:)
Bellowhead: 7
I Am Kloot: 8
My Morning Jacket: 8
Foals: 7 
Consitently good, all day.

Sun:
Scala and Kolacny Brothers: 5
Anna Calvi: 8
These Are End Times: 5
Sea of Bees: 6.5
Iron and Wine: 5
The Bees: 7
Lykke Li: 9.5
Eels: 9 
Some iffy acts, but cracking end to the festival.

Bit late to the party, but I might do a review at some point.

thursday
tim clare 6
hightide andrew motion play 6
future shorts 7
guillemots oldboy 7
 
friday
braids 8
avi buffallo 4
edwyn collins 5
the phantom band 7
owen jones 6
deerhunter 4
ryoji ikeda 6
caribou 5
bright eyes 7
glasser 3
the national 9
pappy's 7
 
saturday
never mind the buzzcocks 4
adam ant 7
they might be giants 9
the walkmen 7
british sea power 8
tim key 9
late night gimp fight 0
david schneider 2
temper temper 3
blue roses soundtracking dr jekyll & mr hyde 7
hypnotic brass ensemble 8
 
sunday
the early edition 6
mark thomas 7
the london snorkelling team 8
instigate debate 6
louis de berniere 6
os mutantes 3
oh land 5
caitlin rose 8
omd 9
lykke li 9
eels 8
saul williams 7
 
 

▲

avi buffallo 4
deerhunter 4
os mutantes 3

wow

Been on holiday for a couple of weeks finally getting around to doing this. 
 
Thursday: 
Future Cinema (Guillemots/Oldboy) - 6
Mr. B The Gentlemen Rhymer - 8 
The Dj's in the wood - 6.5
 
Friday:
 Braids - 8
Rob Rouse - 7
Josh Widdicombe -6.5
Richard Herring - 8
Chapel Club - 4 (mostly due to poor audience down the front!) 
Grouplove - 9.5 
Kt Tunstall (A Female Friend wanted to see her...) - 3
Bright Eyes (knew absolutely NONE   of his Material but) - 8.5
The Vaccines - 8 
The National - 10 
 
Saturday: 
Never Mind the Buzzcocks - 8
Adam Ant - 8.5 
Villagers - 6.5 
Cerebral Ballzy - 7.5
Dog is Dead - 5
Elvis Mcgonagall - 7
Tim Key - 9.5 
Bellowhead - 8.5
The Cribs - 10
Tribes - 8
Echo and the Bunnymen (only saw the Killing moon and The Cutter, which is what i planed) - 7 
Foals - 8.5 
 
Sunday:
Scala & Kolancy Brothers - 4/5 
Anna Calvi - 10
Kele - 7.5 
Dylan Moran - 8.5
Everything Everything (i know they are AWFUL live but i keep going back to them like an abused lover) - 2 
Ghostpoet - 8
Glasvegas - 0 (Left for)
OMD - 8 (9.5 for the guy who join in with our groups dance moves!)
Foster The People - 4 (Dull Dull Dull)
Gold Panda - 7
Dry The River (only saw a small section but surprisingly enjoyable) - 7
Suede (hit after hit after hit) - 9.5
 
Top 5 Acts:
 1.  The National 
2. Anna Calvi
3. The Cribs
4. Grouplove
5. Tim Key