I think it's definitely worth mentioning, it gives people that care about good measurements the reassurance & also the information in the form of the graphs to see how good the speaker is before you buy it. He's proving it's a good speaker which is a good selling point, it would be silly not to advertise the fact that it's been anechoically measured as part of it's development process, and indeed each unit that comes off the production line (I'm told) is also measured as such & graph included within the product that arrives with the customer, so they have their own personalised measurement of their unit for additional reassurance and can also be theoretically used to create an Anechoic EQ that is tailored to that specific unit, which are all good selling points for consumers that are interested in measurements.