Really? Thats just nonsense.
I have used a True Temper 20 oz. long handle for ever. It is so well balanced that I use it for trim as well. When they quit making them I ordered 2 dozen. I have three left.
They can still be found on ebay, and a company called Barco originally made them for True Temper. Stanleys had one that looked like it but the rubber on the handle was less grippy, and the handle was mild steel instead of Chrome-Moly.
If I had more I'd give you one. I used to give them to every new employee. I used to throw their Estwings out in the lake and hand them a Rocket.
Larry