There's a lot of people on here making big power with the stock TB. Again, a tune can increase the sensitivity of the throttle response. There is a larger DBW TB you can get from the UK. Someone on here installed it a while back. It is pretty expensive though.
FR '11 FF Mod pick
FR '12 Carlisle Nifty Fifty Award/Best in Boost/Best 08-11/Finest 5 Pick
FR '13 Carlisle 1st Place Award 08-11 Focus/1st place 08-11 Focus (FR13 award)/FSWerks pick/Ford Racing pick/Finest 5 pick/Top pick in the finest 5