My question is,

out of 100 reviews, how many are fake??

I write 1 review for any new lady I have seen on ter.

I don't waste my time writing reviews over and over with ladies I repeat with
as they do not count towards vip membership.

I do not write reviews on other boards unless I'm asked by provider.

That's what I've heard from a few women, fairly consistently.

There is a thread...over a year ago about a woman with 100+ reviews who swallowed in all her reviews.  Guys were trying to estimate how many gallons she had swallowed in her career up to that time.

of the providers that I would see. It is now 0% on TER. Zero, zero, zero.

I don't think your 100 review question has an easy answer because there are providers who may need to see 1,000 or more hobbyists to get to 100 reviews or there could be some who only need 200. Some may never get to 100. It depends on marketing, areas of work and other factors.

Now, I only write reviews if my experience is vastly different from others', or if the provider is very new and has no reviews or only a few reviews. No need to rehash if the providers already has many reviews and my experience is same as others'.

I have been hobbying since 99, ter VIP since 08 and I see atleat 1 girl per week ( sometimes more and sometimes less).  
By my own estimate I probably hobby about 50/75 times per year. I have only written a few reviews.  
I actually feel guilty of not writing reviews as I try to see well reviewed girls and i should be doing the same. But I am to lazy to write reviews.

I write reviews on every provider I see that I can give a score of 7/7 or better.

As I wrote previously, I appreciate all these girls do for us.  It can't be easy doing what they do, but they try to greet me with a smile and give me the illusion of being my hot GF for that hour.  Sometimes for one reason or another, we might not click.  However as with all human encounters, it's not always clear why that is.  If someone is blatantly trying to rip me off, that's one thing.  But just because we didn't click, I don't think I have the right to jeopardize her livelihood.  Recently I've come to the conclusion that if I can't give a review score of at least 7/7, I'm not going to review that provider.

7/7 would be a decent session with a pretty provider
8/8 would be a nice GFE session with a very pretty provider
9/9 would be a fantastic GFE session with a DDG provider

My top aggregate score is 18 (3 10/8 and many 9/9s) so far with 19 being probably top possible score since ladies I see are not into those services that would garner a perfect 10.  I'm still on the lookout for that elusive 10/9.

20 reviews in 3 months to get into the regional top 5. Seems pretty suspicious to me.

asked; but even then may not. It would ruin my fun by trying to remember what was happening as it happens just so I can write a review.