Relatively quick - met HR, then the hiring manager, then a few folks on the team within about 2 weeks. Answer came back within a week. Sadly no offer, but they had a good process and it was clear and fair.
Director, Market Research applicants have rated the interview process at Exact Sciences with 3 out of 5 (where 5 is the highest level of difficulty) and assessed their interview experience as 100% positive. To compare, the company-average is 57.5% positive. This is according to Glassdoor user ratings.
Here are the most commonly searched roles for interview reports -