LOL at this thread - cross-purposes whenever I have seen them!!
So, Star. Your DS is due to start his pre-school year in September, then Reception in 2011. You have been given annonymised data of children in the reception year of a potential school, and wanted to know what the significance of them are. Yes?
This says "FSP 6 (the expected outcome for median performance at the end of Reception)"
So what the school are trying to show you is that lots of children come in on a FSP 5, and leave Year R on FSP 7. As the 'norm' is to leave Year R on FSP 6, they are a very good school
But of course, you know that a very good school for typical children may well have a very different profile than that of a very good school for your DS.