Ditto for Goucher.
It's definitely stressful for most people. You get rough categories on the extremes: the perfectionists who do really well but couldn't do so without being constantly worried about their performance. And on the other end, the truly non-traditional types who have trouble adjusting to, or keeping up with the workload. In the middle, you have everyone else with various stress levels. Lastly, you also have a minority who naturally get all the material or are just great at finding a study rhythm that minimizes stress and maximizes results.
Goucher also is the opposite of cutthroat - in fact, those doing really well in physics just refrained from taking an exam to bump up the curve for those who were struggling. It's also great to have our own TA, and you can always find at least ten people who can help you out at any given time. The advising for med school applications is also second to none. On the other hand, there's only 30 of us, so the class dynamic probably changes a little more than Bryn Mawr's from year to year depending on what the average anxiety level is.
Pre-med sucks. It's meant to suck (for all the wrong reasons). Programs like Goucher and Bryn Mawr definitely take the edge off things as much as possible. I know people taking two pre-med classes part time who are more stressed than I am taking three at once.