Best to split the imitative side and the pulling into two different categories Matt.If you bear it in mind that you are trying to provoke a reflex,aggressive reaction from the fish rather than doing anything imitative when pulling wets you wont go far wrong.Doesnt hurt to experiment with retrieve speed but in my experience, a fairly brisk pace is best....
The only time we are doing anything imitative with trads is when holding the bob and middle fly in the surface or dibbling them at the end of the retrieve.