I think this deserves a different thread.
Apparently the good folks at Hornady did test the differences and here is what they found:
Results looked like this:Several manufacturers offer match grade primers. ...(they) supposedly offer high consistency in ignition, theoretically improving accuracy. In this comparison, all components are the same: same case, same powder lot and charge, same bullet and seating depth, except one group is loaded with a standard primer while the other is loaded with a match grade primer.
five loads with standard primers yielded avg velocity of 3,338 fps and an SD of 38 with avg pressure of 48,320 C.U.P. and an SD of 1,775
five loads with match primers yielded avg velocity of 3,316 fps and an SD of 16 with avg pressure of 46,960 C.U.P. and an SD of 600.
However they also noted that
From Hornady Handbook of Cartridge Reloading Rifle-Pistol Fourth Edition Vol 1 Seventh Printing 1999 Copyright 1991standard primers are also quite consistent. ...It probably requires a match grade firearm to reveal any significant difference.
So in that sense at least they do agree with you Versifier.