Well even though I bought it a few weeks ago, i knew it didn't feel right. After reading the forums I had my suspiction's on the diverter valve. Anyway changed it for the revision type D piston type tonight and all of a sudden it feel's like a GTi again

The old DV diaphagm was knackered completely with 2 large hole's in!

This type D is off the TSi engine and is supposed to hold boost better than the forge item according to some, certainly doesn't feel like it tails off anywhere near the redline!
Was very flat in comparison now it feel's similar to my old mk4 although not as aggressive, but I can fix that with a remap!
This also sorted my lumpy idle as per the other topic I posted about
Cheers, Sam