== "Travailing"! == 

 It is bullshit. 
 If some experiments may suggest it all right, it must rather refer to something else than SPEED - it can be gravity or whatever... 
 Because there can't be any such ABSOLUTE difference in time measurements (in this case pertaining to SPEED)  because, as the same exact science states that there's no evidence of any ABSOLUTE CENTRE OF THE UNIVERSE (hence the ULTIMATE FRAME for all speed measurements), there CAN'T EXIST a SCIENTIFIC HYPOTHESIS insisting that a certain absolute determination depends on such RELATIONAL rubbish as SPEED.