What the guy in the video you posted says is consistent with what I said - he is just very vague, and I think a lot of people misunderstand what this per core does. When Intel cores are idle, they can be basically shot down and the saved power presumably lets the frequency be raised for the remaining active cores. All cores see the same frequency (except those inactive and shut down). For locked processors, Intel has fixed frequency boosts with the boost value depending on the number of active cores (see the link below). One active core gets a higher boost than 2 active cores...etc. Don't forget we are talking about a turbo boost BIOS setting, not a processor setting.
Now with unlocked processors, you can specify how much boost (the actual frequency is specified in the BIOS) 1 active core gets and what 2 active cores gets, etc. This is the per core frequency setting.
All active cores get the same frequency, the architecture doesn't allow for different frequencies on different cores (see the Intel faqs below "Is turbo frequency the same for all active cores in the processor?"
http://www.intel.com/support/processors/sb/CS-029908.htmEdited by GeneO - 10/19/12 at 11:19am