if I may, the 200 years of Tradition unimpeded by Progress was a slogan seen in Backdraft, dont think it's unique to Chicago though as I remember my instructor at the academy saying it (he was old school too)
some things have changed, most for the better ( i remember riding back step, and long rubber coats)
I have seen the euro style helmets, I think MSA has an agreement with Gallet (the fighter pilot style one) some canadian departments use them, and i see them on ebay every now and then, but i think its a popularity thing too, most everyone wears a helmet from cairns or bullard (or one of the others) how many times have you seen someone on the east coast wearing a Phoenix (LA style)
color of the trucks is somewhat traditional, I think that might have more to do with the acceptance of the non traditional colors and visiblity than mere science ie: if your department has always had red, or white, or whatever color, then your citizens know that fire trucks in that town/city are always (whatever color)
as for our turnouts, maybe the tan of the new gear is more visible, less heat absorbent or what have you, but as long as it protects me, it could be fluorescent blue for all i care (though i admit, the black is traditonal and look good with any of the reflective striping)