Im messing with them now, iv been all over piping turbo etc and no faults, taking out coil packs now for a look, the only thing i cant understand if its coil packs why is it running perfect up to turbo rpm ?? cant get any today aaaaaaaaaahhhhhh
 
That was my first thought the coil packs (I don't even own a 1.8T!). Symptoms you describe are the same as others have had. Why can't VAG make a decent set of coil packs?!?!

Least its sorted (cheaply) and you can have a merry crimbo :D