I just want to suggest that it's not as clear cut as scholars prefering detail and other users prefering breadth.  When we asked 600 users from verious H-Net and other lists whether they prefered fewer but more detailed finding aids or a greater number of less detailed finding aids, those prefering the latter were 2 to 1 over the former.  The respondent pool had its largest single group, approximately 1/3 of the total, identify as college or university faculty members. The second highest group was "other," unfortunately; the third highest group was graduate students (about a quarter of respondents).  We haven't yet done the necessary regressions to be certain that faculty favor breadth over depth in this instance, but given their preponderance in the pool it would be very surprising if such were not the case.