Persimmon standard was 11 degrees for most manufacturers. More important than the loft in my opinion would be the flex pattern of the shaft. My numbers are not dissimilar from those noted. I use a 9.5 degree loft, but my shaft is a Fubuki which I find to be tip soft. The combo was the best I found for distance and accuracy. Awful lot of testing and comparison must go on before you can find a driver anymore. Used to look at persimmon, if the grain looked good, you would stick a dynamic stiff shaft in and go play. Every now and then you found a head, because of the grain and weight, would hit it twenty yards past everything else, that was the keeper you slept with. Miss it, awful hard to get excited about a driver you will replace in six months when something new comes along.