I've noticed the specs and some crackling sound and sparks during light off on my last bag of KBB as well. They may be tinkering with the formula a bit. To Chris's point, I haven't seen any new advertisements. I could be that they have to change up their formula now and again to pass their internal quality/performance checks. I would imagine they do some sort of a burn test on their products to check quality and given "natural" variation" in their ingredients they probably have to tweak the recipe now and then.
I just hit Kingsford's website to see if there was anything about a formula change and saw several reviews that are consistent with our observations, here was one post where someone noticed a packaging/label change "
We bought a twin pack of Original and it's not Original anymore! The bag says new BBQ flavor in small print. What happened to the just Original charcoal? Please take out the new BBQ flavor it's yucky! We will have to go to a different brand to get back that natural BBQ flavor." Basically, a lot of negative reviews on the KBB original lately.
But then..... if you look at the Kingsford website reviews, there are mostly positive reviews on the Kingsford "pro" and Kingsford "hardwood" briquettes. I'm thinking Kingsford may have cheapened the "blue bag" and maybe rebranded the original to something like Pro or Hardwood so they could make a few more $$$$ per bag. Maybe, they realized they had a superior product and could charge more $$$ for it? Unfortunately, KF Pro and KF Hardwood are probably harder for us all to find and cost a bit more per pound (I generally won't pay more than $1 per lb of charcoal). I see KF Pro on occasion at Ace Hardware, and have never seen KF hardwood anywhere.
Since we're talking charcoal.... I am no tree hugger, but I do believe in sustainable forestry. I am a little concerned about the emergence of new charcoal we import from Central and South America (Fogo and Jealous Devil). Has anyone researched the sustainability practices as they relate to imported charcoal? Brazil might have some regulations around their forestry/harvesting, but I would have my doubts about places in Central America other than Costa Rica. I may do a bit of checking on how they harvest hickory and oak in Missouri and maybe start a new string. Probably going to wait until the weather gets a little less pleasant outside before starting that research.