CountessD, I think I know who you are now but am embarrassed to introduce myself in case I'm wrong!
Well, as far as the reading schemes go, in DS1's first school abroad they used a mixture of schemes all jumbled together and banded together by colour - which is what they do from Y1 in the current school. This meant that children kept getting different 'sight words' and read lots of books 'across' at the same level - DS1, who was one of the 3 best readers in his class (PFB!), was reading a mixture of books including a couple of Stage 3 ORT at about this time in Reception. By the end of Reception he was reading a band that included ORT 6 and 7. There were 2 children on the next band up.
But in Reception in our dcs' current school, they seem to just use ORT, which means that the children are exposed to the ORT vocabulary and sentence structure all the time (I mean, presumably that's how a reading scheme is supposed to be used - each book or level builds on the next). The teachers seem to have a lower threshold for moving them up to the next level, from my experience of listening to children.
In Y1 in DS1's first school, the 4 best readers (top reading group, if you like) were reading scheme books by the end of Y1 that the top reading group is reading at the start of Y1 in the current school. But I'm sure outside school they are reading at similar levels.
So I suppose I just mean that what level a child is on isn't necessarily comparable across schools.
That is really long and boring and not at all interesting to anyone other than CD - and possibly not even to CD!