"When boiling lobster, how do you tell when it's done? Is there a rough estimate of cooking time (eg: time/ounce, etc...)? 
I worked as a coffee roaster for a number of years and met a lot of people. There is a lot of variation to this answer.   What I found works the best is 10-11 g of coffee per 6 oz cup, or 180 mL, so 12 cup maker would be 120 g. Also, the coffee should always be ground to suit the particulars of the brewing method. 