Re: Rod Grip: Thumb or Index Finger?
Stopping your rod at the appropriate points in the casting stroke is far more important than how you grip the rod. When I teach a new angler to cast I make it a point to have them keep their thumb on top of the grip so that they are less likely to break their wrist, which opens up their loop and kills the cast. Once you have the basic stopping points of the cast down I don't think it makes one bit of difference in your ability to cast further or have better accuracy. We learn to walk with one foot in front of the other, but eventually we all develop our own strut.