Whilst I totally agree with Nicks comments regarding BA perhaps not getting the very cream of the crop, as they used to and perhaps expect, due to the other sponsorship schemes out there, it's also worth remembering that not all of the "cream" are on mentored schemes...for example OAA currently have one student who is 7 exams in to the theoreticals and is sitting on a 100% average and loads moreon >95% averages...
As far as I, or any of my colleagues, are aware no-one else has EVER achieved 100% on all exams taken and 99% isn't exactly shabby either, so it would be fair to assume that at least one very worthy candidate is still unattached....