@@SasQ, Well, I fear you're being lied to. Like so many. Germans are good at compound words, but that's just about it. I can invent words like that on my own, but the longer they get, the more you're just... building a sentence without breaks. Which doesn't happen. There is no widespread use of tongue twisting yourself into asphyxiation.
High german has nothing to do with it either, the distinction is false, sorry to say. High german just happens to be the written german (and legally required for everything official), the common tongue (think english in LOTR), dialects only rarely appear outside of spoken form. Examples of long words you *could* use doesn't make them common or even unique to german... the longest german word I've came across in my time was Löschwassereinspeisung. That's not remarkably long, in my opinion, it's on par with... "anime convention". Those gargantuan words you found are more like inside jokes, ya know? They exist, but only unto and for the sake of.. itself.
Bottom line: if the word is too long, there is a better word for it, and if it's even longer, it was contrived by some smart-arse. Take my word for it. Won't you?