Replying to DIN and Forward Pressure

I changed the DIN on my bindings after bringing them home from the shop as many of us do. When riding the forward pressure was off to the point where i could feel wobble between the boot and binding. When I took them to the shop they blamed me saying that by changing the DIN it affects forward pressure. I don't think this is the case, but I may very well be wrong.

My question: does changing the DIN setting of the binding affect forward pressure at all?