Not saying that at all. I'm asking what a circular path delivery looks like. I'm pretty sure I understand the straight line, but I just don't understand circular path.
Ok,
All delivery paths of the hands take on a circular path. A straight line is a concept - when you
pull the shaft longitudinally (say vertically downwards for simplicity sake) ie.. swing a rope - you are using a straight line delivery (or an angled line but don't worry about that for now). When you
push and thrust the right arm against the clubshaft you are using radial acceleration "driving an axe" into the ground.
In a nutshell the more you push - using right arm thrust the more your delivery path will be more circular. The more you pull - using the rotating pivot to pull your left arm downplane the more straight line your delivery path will be.
If someone is saying that you have a circular delivery path you probably have a sweep release (you release the club early in the downswing) or you are really thrusting your right arm.
In lay mans terms:
your swing radius gets longer earlier due to an earlier release point - The club is working in a circle earlier end of story 
I'd be asking you if the club is on plane in the downswing before you worry about what dekivery path your are using. Don't put variations before samenesses
