<p>Inq - you should be aware that graduate level study is completely different from undergrad (even upper level undergrad). In my field (Classics) there is no comparison.</p>
<p>The classes are small (sometimes very small, i.e. 3 or 4 students and the professor) seminars, meeting once a week for (say) 3 hours. In them you are expected to be prepared to discuss the assigned material in extreme detail - in some cases the students will be the ones presenting the material with the professor and the other students asking the questions. This can be challenging ;-)</p>
<p>The in-class work, including your ability to maintain a scholarly discussion and written work (often a 25-50 page paper) are how you will be graded.</p>
<p>And of course, at some point YOU will be the one doing the lecture - virtually all programs have a teaching component, even if your aid package does not require 2-4 semesters of TA work.</p>
<p>If you have trouble maintaining focus for extended periods (after all a seminar is rather like a triple length lecture) you might want to very seriously evaluate (with the help of friendly professors) your suitability for graduate school.</p>