I'm not referring to a PRISM slide for when Skype wiretapping began. PRISM ingestion happens long after a system can be wiretapped but presumably contains data from the when the FBI first started wiretapping these systems. I'm referencing documents the Guardian claimed to have seen that said wiretapping work began in November 2010. Also, 2/6/2011 means February 6, 2011 in the American system. According to The Guardian:
"According to the NSA documents, work had begun on smoothly integrating Skype into Prism in November 2010, but it was not until 4 February 2011 that the company was served with a directive to comply signed by the attorney general.
"The NSA was able to start tasking Skype communications the following day, and collection began on 6 February."
It is not rude to point out misinformation, and your comment fits the definition of "conspiracy theory."