I have to say, Clive, that you operate in strange ways sometimes. Not necessarily a bad thing (I like those that think differently), but this one I'm confused by.
Delta 100 and FP4+ look pretty similar in a print, actually, and at 8x10 size I don't think most people could tell a difference. When you print large, Delta 100 is sharper and finer grained, and when you expose film at night, Delta 100 has less reciprocity failure. The two films are a lot more similar than they are different.
Thomas, you must remember that I am a purist who likes grains to be in the emulsion at whatever orientation they are laid down. The concept of tabular grain technology is fine, but I don't believe that all grains can be orientated in the same direction, thus destroying the integrity of the concept. But then I am probably slightly mad.