<p>Thanks for the support, but can we maintain civility, and stick to the question at hand?</p>
<p>A very rough approximate answer would be-look at the entrance qualifications of the students (grades, test scores), then see that most students get something less than an A in most classes. So an A is somewhat above the mean among a group of highly selected students. Absent testimony from people who have been undergrads at Brown and elsewhere, or faculty who have taught there and elsewhere, it will be difficult to find a more precise answer.</p>