<p>Crew and Rowling demand a lot of time commitment. IMHO, It is not very compatible with premed. I heard they need to get up early for practice and many science classes are early morning as well.
In terms of percentage of premeds, bio > mb&b (biophysics and biochem) > chem.
Any of these programs are more than good enough (somestimes maybe too good for some premeds who are not so much into bench research) for premeds, judging from the caliber of the professors. A more likely issue, if any, is whether you as a student is good enough to stand out among the students who may be as good as you. After all, there are many perspective premeds comming in each year, and in the summer of junior year, only about 80 non-international students (in one class year at least, likely in year 2007 or 2008) apply to medical schools. (Including alumni, the number is about 200.) About 70% of admitted students go back to their in-state public medical schools.</p>
<p>I am not sure whether the 3 majors attract top notch students so that their GPA is higher (or lower?) But the introductory science classes seem to attract good students. Some political science or history or English students may still take these classes if they are premed. Their "science GPA" may not be lower than many bio/chem majors. (Two examples: one political science major last year: science GPA=3.92. One social science major this year: science GPA: 3.95+.) Do not underestimate the science aptitude of those non-science majors, at least at the premed class level.</p>
<p>Premed students do help each other on problem sets, etc. It is not cut-throat in this sense.</p>