Washington DC
Actually, I have no idea how the review process works. But I took several steps to get my first reviews through successfully with the first attempt. Many of the things I list have already been suggested by previous posters in the thread, including the OP.
TER is, first of all, an entertainment destination. On the opening page of the site it says: "everything contained here is fiction and is for your entertainment and amusement only." That means good writing is appropriate. I used telling details. I set out to use proper grammar and proofread to confirm that. I ran a spelling and punctuation check. I put spaces between paragraphs.
I carefully read and followed the guidelines for submissions. I read their description of what goes in the the non-VIP and VIP sections several times.
I joined VIP for a year. I thought it was worth it-- it would pay for itself in one ROB avoided.
I made my submissions in the middle of my membership term. In other words, I was neither brand new, which is always a bit suspicious, nor was my membership about to expire (therefore minimizing the possibility that I was motivated to create a review for membership credit).
I picked girls who were already well-reviewed and established. Others have posited on the discussion boards that new reviewing new is a difficult combination to get through the approval process.
I made my two submissions close to each other in time, and they were a mix of agency and independent girls. My hope was that it would increase the chances of my being thought of as a "review writer," rather than just another person waiting on his first approval. I originally wanted to submit three reviews nearly simultaneously, but my third girl flaked, twice.
I studied and modeled my reviews after well-known, well-established reviewers. The big guys of the site, you know who you are, I thank you. I looked at what details were typically included and the language used to describe it.
I made sure that the reviews I submitted were consistent with other reviews. As a newbie to the site, I wasn't about to be the one who gives the girl with a string of 9's and 10's her first 7, nor would I be the guy who got a "9" performance out of a girl known for 6's & 7's-- and lower. I knew that my first ever reviews probably couldn't be groundbreaking. And even though I've been in the hobby for decades, I still felt it was worth seeing several girls while in the mindset of reviewing before I wrote my first reviews, just to get my bearings within the enumerated subjective scales.
(There's no need to out who I'm talking about, the lower numbers have long since made it to the review histories of everyone to whom I refer. And BTW, I don't think a "7" is anything to be ashamed of-- I've contacted providers with 4's & 5's-- and lower.)
I made sure I had a solid discussion board presence, including but not limited to one with the independent touring provider whom I reviewed during the week of her visit. In my case, that was one well-written response to an open-ended question my provider posted in her weekly advertisement. I picked a girl who tended to have a chatty presence on the local boards in her touring cities. When she posted something to which I could respond, I took the opportunity to do so.
Finally, my suspicion is that being verbose helps. Longer stuff, though often skipped over by readers (myself included), comes across differently to the gatekeepers than short stuff. Just do us all a favor and hit the Return key twice after paragraphs, and keep them brief, in the journalistic style. And be aware that the upper limit of characters is several hundred characters below what the software claims is the maximum.
Again, I stress that I have no idea what the TER people looked at in my case. I'm only recounting the active steps I took to be credible as a new reviewer, motivated only by the fact that it would really annoy me to have my... work of fiction 
rejected. Let's hope I haven't jinxed the system for myself somehow.