My ds is in year 8 at a Bucks grammar - at a recent parents evening his Head of Year spoke to us about him working at the potential indicated by his 11+ score and CATs - so whilst it is obviously different at his school then Guest55's the score was very much looked at and still being referred to after 2 years. (I hasten to add it was the school who brought up the score not me). His school sets targets based on the CATs they administer at the start of year 7.
Really surprised to hear this. Not in Bucks but I do know from my sons' school that although some of the boys in Y7 are keen on comparing their scores (usually the ones who have the highest!) there is no correlation between those and later results and if anything some of the ones who came on appeal or as in-year admissions outperform the average at GCSE. Given that the difference once standardised and age-adjusted usually comes down to about half a mark here or there at age 10 on a very stressful day, it is hard to understand why anyone would put significance onto it even enough to keep a record.
Again, different area, but at Y10 parents' evening last night the GCSE grade predictions are starting to emerge (first time they have been mentioned) and seem to be based, rather sensibly in my view, on DS2's recent performance.