I am not really sure what exactly a litmus test is but as I was reading the questions (which were pretty funny :)) I noticed that almost all of them are somehow related to the bad things about Bulgaria. Maybe that's the point of the litmus test, I don't know.
But even though I can add many more bad things about my country there are certainly a lot of good things as well. If I was the guy who was hesitating about coming to Bulgaria, I'd probably abandon the idea of doing it after reading these questions.
But then I guess it's because I've lived in this country for more than 20 years and I'm used to all these bad things and know that they're not actually so bad.