I heard this quote from Shamir today about Israel's real intent to stall with talks while they create facts on the ground with settlements that will make a Palestinian state impossible. We in the US often make it seem like Israel's trying their utmost and doing everything possible for peace that they can do; we are just waiting on Palestinians to fullfill their obligations. This is far from the truth if you listen to Israeli leaders themselves- Shamir, Sharon, etc.
Democracy Now Monday June 15, talking about Netanyahu's June 14 policy speech:
RABBI ARIK ASCHERMAN: Well, it’s, of course, significant that he even made a policy address. Israeli leaders don’t usually do that. That shows that he—that our prime minister felt a need to respond to President Obama in a very significant way.
I’m, unfortunately, always remembered of the words of our former prime minister, Yitzhak Shamir, when he was voted out of office. He had been the prime minister during the beginning of the Madrid process. And he said, “You know, it’s too bad that I was voted out of office. My plan was to keep on talking and talking and talking, all the while creating facts on the ground, so that by the time we actually got anywhere, there would be—it would be moot. There would be nothing really to talk about.”
This is the actual quote I found after some digging:
Osamah Khalil, The Electronic Intifada, 29 November 2007
After leaving office, Shamir explained why he agreed to attend the 1991 Madrid Peace Conference, stating that although Israel participated in negotiations with the Palestinians, "I would have carried on autonomy talks for ten years and meanwhile we would have reached a half million people in Judea and Samaria." 
 Joseph Harif, "Interview with Yizakh Shamir," Ma'ariv, 26 June 1992; Avi Shlaim, "Prelude to the Accord: Likud, Labor, and the Palestinians," Journal of Palestine Studies, p 23 (1994).
And here is some backpedaling from those remarks at the time, after ruffling feathers of "friends". There are just too many statements by too many leaders to believe anything other than the original impression. Especially if you read some of the other stuff Shamir said (his talk of "Greater Israel", etc).