Yes. I have not forgotten this question, and I've actually been looking for the answer to this. Dan Wiggins explained this in the Adire Audio "Woofer Speed" white paper. Here it is - summarized:
Mass isn't the problem - inductance is. So if you want faster transient response, ignore that moving mass parameter that some manufacturers push - look at the inductance! And if they don't list the inductance, ask yourself why - is there something they don't want to show? Inductance is the key to driver transient response - ask for it when transient response comes up!
Additionally - measuring the same cabinet with and without a series inductor showed me that while the inductor "does what was intended" in flattening the response, it does so by cutting everything down to a level that is lower than the low point in the passband response already.
Adding a series inductor cuts transient response.
Adding a resistance cuts efficiency.
I'd rather avoid the downsides to this approach, it is better to design a different cabinet or use a different driver.
Use a line-level crossover.... you avoid putting anything in series with the driver and you have MUCH more design flexibility.