Simply denying that a problem exists and blaming it on turbo lag is an easy out. I think mazda needs to get directly involved and a rep needs to drive the vehicle. I think the situation is in your hands now and you need to take over, its obvious from your posts that the dealer isnt going to help you out.
I will tell you this, when Mazda bought my car back, it frankly had nothing to do with the dealer that I purchased my car from. Once Mazda was involved, the car became a mazda issue and the dealer service and sales was completely out of the picture. Get mazda involved and demand some action. If it truly is a 4 second lag, something is wrong and they need to rectify your concerns and/or the problem
I will tell you this, when Mazda bought my car back, it frankly had nothing to do with the dealer that I purchased my car from. Once Mazda was involved, the car became a mazda issue and the dealer service and sales was completely out of the picture. Get mazda involved and demand some action. If it truly is a 4 second lag, something is wrong and they need to rectify your concerns and/or the problem