So I just ran an experiment on rMG. The results are depressing...
~Lap 1 Big Jump Success Rate~
Total attempts....................100
19 Total Big Jumps..............19%
17 "Normal" Jumps.............17%
2 "Ultra" Jumps....................2%
Note: I only counted 100 attempts at the lap 1 BJ, not how many times I restarted the track.
"Normal" jumps are the weak, crappy jumps. Normal BJ's give me a L1 split of 32.55x-32.8xx (not what I want)
"Ultra" jumps are what I need to get the WR. They give me a L1 split of 32.3xx-32.5xx (need a low .4 at the very least, preferably a .3)
In conclusion, it's a VERY long shot