It might be a huge thing. Maybe Stockton wasn't really all that and neither is CP3 or Derron now. The assumption has been that they're recording what happened accurately and we're comparing apples to apples, now we're finding out, that isn't really the case.
At least they're not fudging on points, as long as they're not fudging on field goal attempts we can compare the team's relative output. But apparently drilling down to compare point guards assist totals or power forward rebounding totals, has to be done with a grain of salt.