I too think it is mostly preconceived notions....what really comes into play is geometry, tubing, construction and size of the frame... At least as far as how a frame feels when ridden.
Of course, there will be variables that contribute to the feel, like which rims, tires, spokes and how they are tuned. Are the bars and stem steel or alloy, etc. There could be any number of combinations that might each feel differently to a specific rider.
In the end, an all Italian ride, with Columbus tubes and Italian parts will certainly feel superior to the rest ! Hehehehe.....yes, yes, I'm a certified Italophile !
Joe