I had the good fortune to meet a very charming husband and wife yesterday and shared a few very pleasant hours on the river with them.
As we walked from our cars the conversation turned to casting and the start and finish points of the acceleration stroke. I said I didn't subscribe the the 10 to 2 method they had previously been taught and when we were on the water I went on to explain why.
Now I'm not saying an acceleration stroke that starts and finishes at these points on a clock face won't work, but it won't work all the time! It ignores the fundamental principles that make for an efficient cast. It also ignores weather conditions and the desired outcome from a cast.
I accept instructors will have different styles of teaching but the content of instruction should be correct and based on the fundamental casting principles.