grip

[dbweathe]

I'm probably bringing up a topic from many posts here, but what grip style does everyone use and which ones are acceptable?

Before ever getting lessons, I used a baseball type grip with all eight fingers on the club. It felt better that way, so I used it.
I took a lesson from a local Ottawa pro last year and thought the first thing he would suggest changing would be my grip. He stated that the 'no overlap baseball grip' was becoming more accepted and gaining popularity amonst amateur and some pro players. With that advice I didn't change my grip and worked on other things.
This year, I have a new swing coach that is rebuilding my swing almost from the ground up. He wasn't happy to see that I didn't overlap my grip when holding the club and changed my grip to an overlap style immediately. I've adopted the overlap grip, but have changed so much more of my swing that I couldn't tell you whether grip hasmade a big difference or not. I'm able to rotate the clubhead through impact better, but can't tell if it's the grip, setting the club, path, address or anything else that was rebuilt.
I'm comfortable with the new grip style only after hitting bucket after bucket of balls, and my swing is much more consistent now than it ever was.
I'm just wondering if gripping the club with and overlap, interlock or basebal style make that much of a difference if your hands are still square at impact.