I've found that smoke flavor (regardless of the wood species) is more dependent on exposure time than anything else. Maintaining a constant stream of smoke throughout the cook will do more for flavor than a whole lot of smoke that ends early in the cook.
I watched one of Baby Back Maniac's WSK cooks, and he used just two small chunks of wood, placed randomly on the charcoal pile, for his cook; no wonder he doesn't get much smoke flavor.
What I do is make a bed of wood pieces, none of them terribly thick (think 3/4" or so) on the bottom of the grate before adding my charcoal. When I start the coals, no matter what direction the burn goes it will be igniting some wood along the way. The result is a constant stream of smoke that permeates the meat.
All grills are unique and require different technique to coax the most out of them. The WSK can give you the smoke profile you want, you just have to adjust to how it likes to run.