I think there's a large discrepancy between the commentators in this thread and the readers in the story forums.
I would say there are a few different types of readers. There are those of us who like writers like Jon Grey and rin573, both of whom have created fantastic story series that took a minimalist approach to describing the competitors. Then there are those who like stories like those written by DottiD, where every competitor has their height, weight, bra size, and description of what their breasts look like described in extreme detail.
I think it may be more nuanced than that. By and large everyone in this thread is or has been a writer in some form, a very creative process. Having also experienced that creative process, I know personally I'm after a little more than "here's two women of x description, they're now fighting" (in the main of course, some simpler stuff is nice on occasion). Really it doesn't matter too much to me who the women in question are or what they look like, I can conjure that up myself. What I enjoy is the creative reasons built up around the combat, and I think a fair number in this thread share this thought process. This is not to say measurements are bad necessarily, it's just that they are not vital to the story, and if the story is written in a way where it is jarring to read measurements, then it's less enjoyable.
However, a lot of readers I imagine, are looking specifically for the fight/sexuality, and may not have a lot of time or want to consider who x character is, or why they are doing what they are doing. They just want two characters doing the thing, and with as much physical detail as possible so they dont have to think about anything. These people, I would think generally, would not write anything of their own, so rely on us writers to provide for them. Keep in mind, while porn can potentially have a good story attached, people dont necessarily go out of their way to read/watch it for that story. There are obviously many other ways to consume a good story without delving into a fetish.
Neither side of the coin is wrong, we are free to indulge in what we like. I can only write what I think I would like to read, and if there's a market for that here, then I'll be happy. If not, then so be it.