Open Advantage Drupal Review

This is an older Drupal review but it discusses many points in easy to follow lists. Some of the details are out-dated, but the basic ideas still apply. From the
Open Advantage Drupal Review:

Drupal is an excellent, lightweight, flexible system which can be used in a variety of contexts, and is one of the open source CMSs I would recommend without hesitation.

The author takes a very academic and thorough approach. I would be interested to see an update for the new 4.7 version coming up.