The article ends with:
"Summary
So here You have it. Google can index (and indexes) hidden text and dynamically inserted text. If content is relavant to Your website, You won't get penalty from google."
I think that's disingenuous. The panda algorithm is believed to specifically target duplicate content. You're saying that if I had a website full of content stolen from more authoritative web sources that I wouldn't lose any ability to rank? I think you're wrong :)
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