Actually, Sadat's peace treaty was very similar to the offer he made earlier, with a deadline of September 1973. Israel didn't respond - Golda Meir discussed it with Dayan and Galili, but didn't even think of informing the Chief of Staff, or the head of Intelligence. Sadat's boldness was in starting a war that everybody knew Egypt would lose, but would shock the Israelis so that they would take his offer more seriously next time (in other words, it was a military defeat but a strategic victory). You can read about it in Kipnis' book, which I see has been translated.