Joseph...I am enjoying your comments, so let me expand on them here.
"I was thinking about why there was a term for that type of thing (DTR). Do you think it is because it is necessary? Or do you think the term exists because women want it and frequently do not get it? Or do you have another opinion on its prevalence?"
Yes, I think it is important for men and women to know where they stand with each other, especially, if the actions are not coinciding with the words.
For example, guy says, "We're just friends." But then he sets a girl apart, takes her out for coffee, hugs and cuddles with her, share dreams or goals with her, and just generally makes her feel more like a girlfriend than just a friend.
Paul told Timothy (a younger man) to treat "younger women as sisters, with absolute purity." 1 Timothy 5:2.
In treating a younger woman as a sister we need to look at brother/sister relationships.
Brothers and sisters love each other, pray for each other, care about each other. HOWEVER they know where they stand with each other. There's no guesswork, no hidden agenda, no say-one-thing-treat-another-way behavior, no flirting, no hope of a life together...they are just brother and sister.
So yes, DTRing in an emotional intimate, undefined relationship is VERY important in maintain a brother and sister in the Lord relationship. It's having emotional integrity with each other and not asking for anything that doesn't belong to you.
Guys have to understand that women are wired to desire emotional intimacy and when they are ambiguous with their emotions towards a woman it can cause her to pull her focus off God, it can put her on an emotional roller coaster, and it can cause pain to her heart. So DTR...it will cause you both a lot less pain in the long run!