That science is called the Moment of Inertia—the measure of an object's resistance to changes to its rotation.
The higher the MOI, the harder it is for the club to be "twisted" by an outside force.
The lower the MOI, the easier on purpose, during the swing, twisting is.
Blade irons, with all of their mass distributed more or less evenly throughout the head, have a far lower MOI than say a hollow-headed 460cc Titanium Driver.
And much less than a cavity back iron.
So, for the highly skilled golfer, the ability to "twist", or manipulate the clubface
during the swing, is "scientifically" easier to do with a blade iron.
But what about a higher MOI twisting less on off-center hits?
Well, if the ball is contacted on the sweetspot of a blade iron, not a big problem for the Hogan's, Nelson's, Snead's, Nicklaus', Miller's, and Eldrick's of the world, that resistance to twisting during an off-center impact, is not a big benefit to them.
So, why would anyone play with a cavity backed club?
Why would anyone play with a hybrid?
Because, mere mortals don't hit the sweetspot like a David Toms, and can't control the clubface like a Lee Buck Trevino.
Folks say that practicing with a blade iron will make you more precise.
Maybe.
But you could guess the same about practicing putting with a small hole, and you'll get your feelings hurt if you ask a real putting expert about that.
What about the feedback?
You mean the sting of an off center hit?
Yeah, that'll help you on a cold day on Long Island in March.
So, Brian, it sounds like you want everyone to run to Edwin Watts and buy four hybrids and some G15's, huh?
Well, not exactly.
What I am saying is simple.
Clubfitting is part science, and part art. You really never know until the pencil hits the card.
But today we have tools like TrackMan, and interchangeable shafts and heads in fitting "carts."
TrackMan will let you take The Combine—and 80 ball through the set test, and find out where you stand in the world, and against yourself.
Or you can take the 10 ball approach test at ANY yardage—over if you please—and see if you can hit G15's better than s57's or Muira's.
And you can look at the club data, the "5 Critical Numbers" that tell the truth about how the rubber hits the road, or in this case how the steel hits the synthetic.
If your club numbers are better, and the Approach Test numbers and Combine numbers are higher with a certain clubhead or shaft or whatever, you'd better at least borrow some for a weekend or your as dumb as a rock.
Or as stubborn as a book literalist.