So as an indicator of this, I thought it would be interesting to see what kind of words people use a lot when they are talking about timbre. The main words I hear from the Classical tradition are "brightness", "warmth", "breathiness", "bite". I think that the only one of these words that I hear from electronic musicians is "warmth", but not that much. Words like "crunchy", "fat" ("phat"), "thick" are more common there, in my experience. To me this points to a different perception of timbre (but is not evidence enough to prove it).
Hi, to my experience this very much depends on the genre where electronic music is used. In fields of dance or club music the latter notions might well be used, but i never heard this in contemporary "serious" or improvised music.
best greetings, Thomas