Lung Cancer - If caught in early stages?

A CT scan showed a pulmonary nodule on my grandmothers lung by accident while looking for something else not related. They want to wait 6 months before doing another scan to evaluate the growth of the nodule to see if its cancerous. Isn't that too long to wait?? If it is cancer and its caught in this stage (its les then an inch and surrounded by normal tissue) is there a good chance of beating it?