I worked with him on this issue and I really think he is hitting the ball further and is more consistent. I tried it myself, and I felt that it actually improved my consistency. I thought it would just improve power but make swinging more difficult, but that doesn't seem to be the case. It's a little surprising actually.
I'll post videos soon.
It varies wildly!!! Sometimes a month goes by. Sometimes Ill check it 50 times in one day. It just depends on so many factors. Current state of my game, boredom, curiosity, and how good the material is.