My letter had a paragraph in bold type halfway down the page indicating I should consider taking graduate level biology courses. I talked to Nelson on Friday and he said those paragraphs are tailored to each individual student. Granted, they are still broad, but some may indicate MCAT, others experience, additional courses, etc.
As some of you have have already recommended, everyone on the wait list should talk to Nelson. When I called on Friday, he told me I was in the top 1/3 of the wait list. I did not get my rank, nor did I find out how long the list is, but he indicated I should be fine if they take the approx. 40 people mentioned in the letter. Of course, he follows that up with saying that each year is different and there is no way to predict what will happen each year. Their best gauge is a multi-year average.
If you have any other questions let me know. Also, I am from Memphis, left for Sewanee, and came back to Mem after graduating. If you have questions, let me know. I have lived on Harbor Town (downtown), in Midtown, out East, etc. I will be more than happy to answer any questions/misconceptions some of you out-of-towners (or in-towners) may have.