Found these parts enlightening:

Lawrence of Cyberia: Details Of The Olmert Peace Plan For The West Bank, Revealed Here And Nowhere Else On The Internet!

(As a quick aside here, I should mention that what Israel refers to as the "West Bank" in its final status offers, is not the West Bank as it is internationally understood.  When Barak, Sharon and Olmert talk about relinquishing x per cent of the "West Bank", they mean that part of the West Bank which is left when you have removed in advance from the equation Jerusalem in the West and the Jordan Valley in the East. Sharon and Olmert proceed from the assumption that those two areas will be annexed to Israel - Barak talks about the Jordan Valley remaining under long-term, "temporary" Israeli control, which amounts in practice to the same thing - and are not up for discussion. So when they talk about "giving" to the Palestinians 93 per cent of the West Bank, they really mean 93 per cent of that 80 - 85 per cent of the occupied West Bank that they are even willing to negotiate over).

Lawrence of Cyberia: Details Of The Olmert Peace Plan For The West Bank, Revealed Here And Nowhere Else On The Internet!

the percentages themselves are not significant. It's not so important that Israel wants to keep 6 - 8 per cent, what is significant is where that 6 - 8 per cent is, and what purpose does it serve Israel to hold on to it. Look back to what I wrote under point one of this post, about how the unchanging Israeli plan for the West Bank over the last 40 years is to control the West bank by cutting off the Palestinians from Jerusalem, from the outside world, from their arable and water resources, and from each other. That is where the significance of the last 6 - 8 per cent lies.