Shouldn't all our key-speeds be in the "Additive" column though?
I guess I might be wrong, but as far as I remember the oclvanityminer was using the multiplicative method. Guess I'll have to look into that.
I'm 100% sure oclvanityminer is searching for patterns belonging to only a single public key at once, and this implies the multiplicative method (if I understand correctly). Still, I don't know if it is actually using that method.