Actually I quoted an article on Wikipedia, I have absolutely no knowledge about Flames of War and hadn't even heard about it before you pointed this out. But even the BBC article agrees with the number of tanks. I have had this debate with my brother a number of times and he says Israel has to attack first because they are the victims, this does sound kind of funny to me. But the BBC article has this:
"They had trained for it for years and the first wave of attacks was about to go in." This is about the Israeli plan to destroy the Egyptian air force nothing hasty about it, it was a well planned attack, not a spur of the moment action.