Keep in mind the 2whp/nil gains were from just the ported manifold on the STOCK TB (that's what you told me on the phone, right?). The skunk one was not even really included in your test yet, because it leaked so badly. Hopefully you can get it to not leak. Once you do, I'd expect better results! Any gains to be had from a basic port job like this (similar to what I have on my car) will only really be realized with a bigger TB, and port-matching manifold inlet to that TB. Furthermore, on a stock turbo and pump gas, there aren't a ton of gains to be had, even with a more elaborate port job. Hoping for 10whp through this is reasonable though I think, and if ever a bigger turbo is put on this car, the gains will be further realized.
For reference, here is my 65mm TB matched to the IM:
The stock TB is 60 or 62mm and the skunk2 one is 68mm, so the area of flow is significantly increased by doing this, so improved throttle response and a slew of other little differences make this mod worth the money.