Ours are at CC now. It's a great school. None seem to leave at 7+, although a few moved earlier to avoid the actual 7+ exam and got into Dulwich private schools. At 11+, a good number get into Alleyns, DC, Trinity and others. They have coaching but then even kids at prep schools seem to have coaching too. We are really happy with Corpus - it's an excellent school and hard to get a place at.