I find quite 'interesting' when schools ask the DC (10-11, in a pressurised environment) about which others schools they have applied to or, even worse (imho) which schools they prefer. If they want that information, it would be more appropriate the ask the parents (e.g. GDST schools ask which other schools you are applying to). In any case, whichever information they may gather would be, even if accurate, only partially telling for their calculations of offers vs places.