Yes, > 100 ohms means greater than 100 ohms, so it only sets a lower limit. Most LOMC cartridges are specified that way with only a lower limit. In theory anything above the quoted figure should be fine and make no difference to the sound but in practice some people find a subtle improvement with a higher figure than the minimum. Some people claim that one particular load value makes the cartridge sing and everything else sounds terrible but I suspect they're exaggerating.
The usual explanation is that the inductance of the cartridge's coils produces a peak in the frequency response and the load impedance tames the peak. However, doing the maths with some typical cartridge specs makes this explanation less than convincing.
Another possibility is that lower load impedances draw more current from the cartridge and that current flowing through the coils produces a back EMF which damps the motion of the coils. It's the same principle as a power amp with a low output impedance damping the coils of a loudspeaker. However, once again the maths doesn't prove this theory entirely convincingly because the damping effect of the stylus suspension swamps the effect of the current in the coils.
Sp who knows?