Great improvement! Congratulations, Don! I don't have a strip nearby but I did just install the 4X/3bar and my butt dyno tells me that my car is much quicker. As icing on the cake, it idles smoother and just performs in a more refined manner as a daily driver, too!
I don't know of a tuner that shares exactly what they do but this tune does not just rely on high boost levels. It really builds boost at a low RPM and sustains it all the way to shift point without wild spikes. My MKS feels like someone strapped the engine from a 747 to the roof! It even sort of sounds like it!