At least 12%, what say U?
27%. That's if MSFT goes from today's price of 27.50 to 35. Not sure how long it would stay there though. It depends on who Ballmer's replacement is. If Bill Gates filled in temporarily, it would definitely boost MSFT's share price.
It wouldn't necessarily rise at all.
Ask yourself, if the captain of the Titanic had been fired immediately AFTER the ship struck the iceberg, would the ship have sunk?