Well the reality of the issue is that there is no such thing as a real "non-inductive capacitor", that's just a marketing term implying the suitablity of a specific capacitor for use in very high frequency applications. When you get up into the VHF/UHF/microwave frequencies every component (including it's lead length) and indeed even PCB circuit traces has some amount of inductance and capacitance which has to be accounted for in the design of circuitry operating at those frequencies. So certainly not every .1ufd cap is identical in it's inherent inductive value, but that does not mean that it's an important parameter for the specfic circuit one is working with. Same applies to resistors, where 'non-inductive' resistors are important for RF circuitry where having a flat frequency response can be important such that wire wound power resistors are not a good choice.