Giovanni, Great question, and they really cannot substantiate or prove the small class size claim. As an instructor, I consider 15 to be a fair size class. Very often, different accrediting bodies, such as nursing, have very strict requirements for the student to faculty ratios that are allowed. Being familiar with these different requirements can often answer the question of whether or not a class is large or small. I think it is better to stay clear of making claims about class sizes for the very reasons you state here: compared to what? Donna Guisado