are the Tiffany diamonds cut "wider" on top? why is it that the Tiffany setting appears to blossom outwards, and other settings all seem to stretch upwards. I have had diamond dealers tell me all kinds of reasons why the setting should stretch up. They say it allows more light to shine through it etc....but plain and simple- I don''t like the look. Why is Tiffany able to have a wider, shorter setting, and everyone else seems to only be able to offer a more closed, taller setting??????