here ya go Jonny...
These portions of aninterview was in the latest issue of Field and Stream

F&S; How do you define aggressive calling, and why does it work?
EYE; Aggressive calling means putting excitement into your calls like real turkeys do. With the success of the restoration programs, hunters have more real hens to compete with than ever. Three soft yelps rarely close the deal. From my experience, the aggressive hen gets the gobbler.

F&S; Are there any situations where you call softly?
EYE; I can't think of any, at the peak of breeding, when gobblers are with hens, calling hunters hear toms gobble going away from them. They'll tell you those birds are call shy and it's time to tone it down. The opposite is true: what's really happening is that hens are leading the toms away from the sound of another hen. Challenge them and they'll come to you, bringing the gobbler along.

F&S; Why don't more hunters call aggressively?
EYE; People think it makes turkeys call shy. That's rediculous; turkeys communicate by making turkey noices. If they were afraid of turkey sounds, they would never mate.

Again....these are comments in an interview. Honestly tho i do sit and call softly some times....most of the time i like this aggressive manner.