I'm not knocking you nor have I knocked anyone other than the inventors and any person using them and reporting success and touting their merits - (that would mean no one on the board as no one here claims to have used them...) but from your own statement, do you see what is wrong?
It just looked to me, simply, that they put them in the tires, drove it, and noted that they eventually got them to not vibrate while driving. .
I was implying for a heck of a lot more scientific method than that! If I were taking you for your words literally, does that statement not sound even to you that perhaps these guys should have then removed all the beads and drove around just as they did with them, only this time without them and reported the results sans beads? Also, bias-ply tires have DRAMATIC CHANGES OCCUR TO THEM as well as a result of heat input. Its even possible with bias ply tires to move that out of balance "shake zone" dramatically simply with air pressure adjustments; at least my junk '53 Chevy balloon type white wall tires told me so.
And that sort of diligence does not even come from proper scientific method, nor some "fancy laboratory procedure" as one would want to do with ANYTHING, let alone something that seems so sketchy. If the manufacturer cannot say plainly how these beads seek out the lightest spot in a wheel assembly, I'd say they are in trouble. But who knows, maybe these are the first application of large scale size nano-bots, only made for tire balancing??? Don't know, but if I had an assembly like a couple tubeless tires that were fine yet pretty heavily out of balance, I'd borrow the funds to prove or disprove these things as pouring beads down the valve stem sounds a lot easier and so, so, so much cheaper than the procedures I am familiar with for BMW motorcycle all the way up to Indy Cars.
Why don't we ask "Myth Buters" to do a segment on them? While I am not confident they won't screw their own test up after seeing them grab two trucks and not even check crap on them and then put the same amount of fuel in them and run one with the windows down and one with them up and A/C on. Crap they could have already had a 10 MPG difference when they took them out to the track! They didn't even roll them over a pair of scales and I guarantee they would not weigh the same, so maybe Myth Busters would not be a good idea after all...
OK, so now someone has to test them! Who said they had a bottle that was not used? OK and who is going to change their tires and have them computer spin balanced? (They should "trick" the way we would normally balance them as the moving beads rolling about would change where the wheel stops each time - so you think they are instantly balanced if you do it "old school" like Duane speaks of and refers to the centering cone devices for our bearings...)
Anyway, not to worry, for these days my testicles see as much use as those beads would in my shop/garage.