I call total and complete bullshit, tommy.
Just because Western music in general follows some conventions doesn't mean that there isn't a range and that one can't be eclectic within that range.
Apply this to literature. Literature generally follows conventions of grammar, spelling, tense and perspective. All literature written or translated into English uses the same 26 letters and almost never uses made-up words. All of it. But how could it be anything less than eclectic to enjoy both Terry Pratchett and J.D. Salinger?
Also, I have never heard anyone claim to be "eclectic" because they like "Franz Ferdinand AND the Flaming Lips".
Finally, terms are relative. In comparison to the average music listener, it is definitely abberant to the norm to listen to more than a few genres which are, at least on the surface, worlds apart. Do The Pipettes and Bardo Pond generally follow the same Western musical conventions? Oh, sure, whatever, I guess so. Do they sound anything alike? No. No, they do not.
This whole argument is stemming from some ridiculously cooler-than-cool refusal to be perceived as attempting to be cool. Which is bullshit that people should outgrow by the age of 21, or at least 25. I don't know how old you guys are, but I outgrew all that shit a long time ago.
My musical taste is eclectic. Fuck you if you think I'm trying to be "cool" by saying that. I'm just trying to be precise.