I think the real matter is the QUALITY of your spun content.
If you're just taking any related article, and auto-spinning that mofo then yea, you'll get shit results.
But if you manually spin it; I'm talking sentence spinning, paragraph spinning, re-position of paragraphs,
synonyms, slang, keyword alterations, etc, then you're bound to get better results.
Flat out saying that "Spun content does not work" is the same as those stupid threads saying that "XXX is dead".
And where exactly are these "tests" you've performed? Wheres the case study, results, keywords, etc?
Where's the proof at? Anyone can say that unique content is better, which it always will be, but wheres you're proof claiming spun content doesn't work?