Well, hell, if I don't just start writing something up, I'll keep studying this thing for weeks....
First I want to make a disclaimer: While I am a linguist, I specialize in theoretical syntax. Nonetheless, in the course of undergrad studies, and even in grad school, I had many opportunities to look at a range of more general linguistic research. I feel like, for this endeavor of studying out the RN, I have some informed opinions to express, but that in other details, I could be as way off as the next person. Of course, language is arguably the most complex feature of the most complex being, so anything we think we know is just what we know now.
Oh, yeah, and: Sorry if I point out things that have been pointed out a 1000 times before. I really am not familiar with much of what's been said already.
A few basic traits of the writer stand out: female, native English-speaker, over 30-early 40s, Southern. Here's what I'm basing that on:
female use of pronouns instead of direct references--research shows that females use pronouns far more than men. I ran the text through a gender analysis tool (not perfectly reliable, but still useful), and it came back 3-4 times as likely to be a female writer than a male. In places it seemed to me that there was a male writer involved, too, and that may be; however, I think it is just as likely that the female writer had some more aggressive traits (which are usually characteristic of male writing).
native Eng-speaker certain idiomatic phrasings indicate this: "if you want her to see 1997"; "brown paper bag"; "hence." This is a somewhat shaky conclusion, though, because I see some phrases that smack of being a very, very fluent Eng speaker, but not native, e.g., the incorrect particle in "deviation of." (s/b "from")
i'm going to send this post this now, and then continue in another--afraid i'll have to type too much again if I lose it!