Eva01 We actually have a good speed feat for Valkyrie Profile:
Since there is no notion of reaction speed being higher than combat speed in Valkyrie Profile, it would indicate that those two are equatable. And since Lezard controlled the meteor to come in from space (it didn't seem like he used gravity or some special move, it seemed as if though he actually controlled it), this means his reaction speed should be at least high enough to control the meteor going at such speeds.
MHS+ - sub-relativistic Valkyrie Profile top tiers? Probably.