AutoSummary, WordCount

I just used the AutoSummary option in Microsoft Word to summarize a history paper I wrote last semester. Here is the original version, and here is the summarized version. I thought that the summary was pretty accurate at choosing the main points of the paper, but it also made me wonder how the program determines this since it wasn't able to discern the difference between the actual text and the Works Cited at the end of the paper.

I then ran the essay through an online word counter and these are the stats I got for the first ten words with the highest frequency:

Unique words:413 Total words:1005
Freq. Word
75 THE
40 OF
30 AND
28 IN
24 TO
23 A
19 THAT
16 IS
14 AS
12 AL

It wasn't too surprising to see that the operational words like "the", "of" and "and" were at the top of the list, but maybe that is suggesting that I should develop a more diverse vocabulary. Oh well, I've gotten by so far with it...