I deffo agree that once term gets under way, no one has any idea who was on the wait list. If I asked DS who is in Y9 if he knew, I guarantee you he would look completely blank, because once you are there the whole focus is on moving forward. Also, to make you feel better, DS waltzed into a school quite easily and is now in the bottom maths set, while one of his mates, who had a specialist maths interview as he was apparently v borderline, is in a higher set. I think my DS had a good day on the day of the exam and his mate had a bad day - but it doesn't set you in stone for the next 5 years, and once you start its all a level playing field.
I know its horrible, because I've been there and it was really stressful, but if you like the school, hang in there.
I also know its tempting to be a bit
about a school that didn't offer your child a place, but in the long run my own experience was that its probably better to suck it up. If anyone wants an example of spectacular mis-administration, we were on a waitlist for a-g-e-s, had quite a lot of conversations with the school, they said we'll let you know if anything comes up, you are definitely our first port of call etc. They then sent us some new Y7 joiners info by email. We got all excited and phoned up and said, oh - does that mean a place has come up and they said - whoops, no, sorry - sent in error - that was just for people who , you know, have a place - you don't. Ouch!