Yes, but like all polls, or studies, you can slant the "standards" to ensure the outcome you desire to show... since the first class medical is only required for Captains, and the study uses current 1st class medicals as the standard, then it fails to include people who may be in the training phase with no need yet for a 1st class, and 1/2 of the current 121 FO's who also will no longer need their 1st class until they upgrade.