Pelosi doesn't bug me nearly as much as Harry Reid, whose default position is lying on his back showing his neck.
Those favorables / unfavorables don't really help if you don't know why. If 50% of the unfavorables think Pelosi is too compromising and not progressive enough (purely as an example) then that cuts down the amount of people that dislike her for being a "San Francisco Democrat" by a fair margin. As a result, using her as a scare tactic could actually backfire on the more conservative candidate.
You mentioned medical school. If the person was a pre-med, a bio, a chem, or a bio-chem major, they would have had to have taken upper-level science course work. I don't see how someone who has taken 400-level biology wouldn't meet the criteria for a med school application because they got AP credit for freshman biology, for example. The upper level coursework supercedes the freshman level coursework.
However, if they were a physics major who decided to apply to med school, then it is entirely possible that they wouldn't have the upper division bio credits to demonstrate subject mastery. In that case, it makes absolute sense that the med school would rule that AP bio credits were not a substitute for a college-level biology requirement, and either require demonstrated mastery or allow for conditional acceptance upon request.
I have an M.S. in Accounting, but my undergrad is in English. I was able to be accepted into my program as a graduate student, but I had to go back and take the full undergraduate business sequence.
I'm starting a Ph.D. program in Accounting in two months. I don't have the statistics background that the program requires as a minimum, but I interviewed well and was able to articulate a research agenda, and was able to get in conditionally based on completion of requisite coursework once I matriculate.
Neither one of those programs had to even look at my application. In fact, for the Ph.D. program, four of the top schools in my research area rejected me outright, because they have a 2 - 3% acceptance rate and don't have to look at exceptions. However, I was still able to get into my top choice, because I took the time to visit campus, had read and was able to discuss the research interests of the faculty, and could explain how my interests complemented faculty interests and how I would be an asset to the program.
Which is why I say there has to be more to the story.
While Obama can put a halt to DADT discharges through an executive order, it takes Congress to repeal DADT. As much as it pains me to see fellow GLBTs getting discharged, I think the legislative route is the better one to take.
It tends to be a smallish subset, who see the world through the lens of the Sexual Revolution, and living an out of a closet life as a revolutionary act. And in the US, for most of the post WW2 era, being openly gay was a revolutionary act.