I checked cut off with standard keys and scored above 110 in gs and 80 in csat. How did all standard keys go wrong in predicting correct Mark's? Does it mean that relying on coaching institutions keys may not be a safe scale to rely on? It was not on the borderline. There can be  cause for worry if you are on the border line.  But despite getting clear margin according to various keys and still not clearing prelims doesn't make any sense. I think there might be some hurried attitude in upsc to just finish paper correction in 20 days and give results.  Who knows whether there is some or not? Should we stop relying on checking coaching institute keys? How else can you be sure of taking up mains? Many people cannot afford to join test series simply without clearing prelims with a good margin. What went utterly wrong this time with coaching institute keys?