Back in 2012, the best finish on 12.5 was 163 by Danny Henry. Five years later, 163 reps would only put you in 441st in the world.
One reason is because athletes like Mat Fraser and Josh Bridges absolutely crushed 18.5. Watch as these two complete the 7-minute AMRAP finishing #1 and #2 in the world.
Fraser finished with 198 reps while Bridges completed 191 reps.