Stringer Bell wrote: it seems like you could have a long exam that's really shitty and a good one that's not long.
^TITCR. Out of curiosity, I went back through my Fall 1L exam answers. My answers ranged from 1600 words (~7 pages) to 4200 words (~17-18 pages). There are two keys to exams: (1) understand what the professor wants and (2) maximize the analysis. Words not spent on analysis (i.e., application of law to fact) are wasted. Some people tend to be more succinct than others. If you're someone who can quickly get in there, identify the issues, and give a great quality analysis in fewer words then you should have shorter exam answers.
Finally, this idea that exam answers across the spectrum look the same is rather suspect for a couple reasons: (a) top performers are generally consistent (i.e., the top 20-25 people in the class are consistently getting far more A's and A-'s than B+'s) and (b) from talking to professors, the difficulty is in the line drawing - i.e., most exam answers clearly fall within a certain category, but it's difficult to draw the line between the categories. Learning to take law school exams is a skill that takes time to learn.