How long does a large check take to clear?

It depends on your bank and how long they think they can hold YOUR money before you get upset and close your account and move your money to another bank. Don't forget that Bank of America's CEO Brian Moynihan stated that his bank has a right to earn a profit. They are in business to make money, which they do off of your money. And to provide customers with timely service is somewhat of an afterthought these days. The longer they hold your money, the more they can make.