I think the more germane question is: How long has he been buying them?
If he has been happily buying and using fireworks for years, then it's significant that he (and presumably others too) noticed a difference in 1.4G.
Exactly David, you're actually
supporting my own logic! Yes, of course
enthusiasts will notice the difference, Yes they will probably not be happy with 1.4 - but it is too hastey to assume that
all other customers will share the same knowledge, experience and expectations....
Without doubt, if you fired two similar products side by side (one at 1.4 and one at 1.3) then in the vast majority of cases the customer may prefer the 1.3 version if they're looking for 'punch' - nobody is arguing against this point. But that is not going to happen as a matter of the norm, as most customers do not have that degree of experience when it comes to fireworks. As Stu has correctly said, selection boxes are a huge chunk of firework sales, but how many 'enthusiasts' buy them?.......the general public quite happily buy shed loads!
An enthusiast of fireworks should not make the naive mistake of trying to speak for non-enthusiasts - ie the general public. Second guessing should be left to those in the industry with the experience of having done some retailing.