Not only is it not funny, it isn't true at all. Disclosure: I am Swiss too, albeit a naturalized one.
"Zürich ist doppelt so gross wie der Wiener Zentralfriedhof, aber nur halb so lustig."
(translated: "Zurich is twice the size of Vienna's Central Cemetery, but only half as much fun.")
Not really my fight, though. I’m an American with Swiss heritage, but German-Swiss. Bankers, not diplomats.
I proudly eat proper rösti. And I pronounce it properly too, much to chagrin of my spouse.