Some interface thought has clearly gone into this. I particularly like the way that its rating counts down 10 to 1 rather than counting up 1 t0 10, and it colour-codes the 9 and 10 in green but colour-codes the 1, 2 and 3 in red. They clearly want to be able to say that they have a 90%+ rating, and if they'd reversed the order and put the 8 in green then more people would have given them an 8 than a 9 or 10.
We only gave them a 9 because the choice of grub at breakfast wasn't all that great and the building only had one lift. Also, we're mean.
My wife filled in the card, by the way; I merely defaced the thumbs-up symbol.