I think that the
second calculatio is legit.I will state my reasons I think it's legit.
Because Toneri crossed from the sunlight of the sun to the shadow of the planet to the light again, then that means that he crossed at least the diameter of the planet.
I don't think that this feat can be written off using cinematic time either, as there was no time distortion between the shots (Time was not sped up nor slowed down at all during the scene of Toneri crossing the planets diameter, when Shikamaru was talking, and when Naruto jumping up to grab Toneri).
There is also no way that this is an outlier. Naruto is at least Mach 3,000+ and after I calculated this feat using Gallvant's scalings I got Mach 7,964.47837240172. That is only a difference of roughly 2.6x times.
Even if I assume that the diameter of the Naruto planet is equal to our own , I would only get a result of Mach 10,080 which is a 3.36x increase in speed.
With the Naruto characters(That get scaled to this) being boosted by only 2.6x for a low end or 3.36x for the high end, this can't possibly be an outlier.