The answer is simple... they have no accurate measure, cause they have turned us all into PvE kids if we wish to compete in STO PvP.
Those of us that PvP likely have been spending more time PvEing since F2P... any real metrics they have are complete horse manure.
Yeah, I can see this being likely. If it is indeed the case, it's kind of offensive they would throw that number out as justification then without a disclaimer saying "this number isn't at all accurate". I guess when you start crunching the numbers though, one can reach that conclusion all on our own.