This is is an interesting and well-written piece by Matt Poepsel, on website design by ad agencies.
Matt's analysis of good and bad practises makes some good points, but what I really want to do in response is add to his answer re why some ad agencies get it wrong.
Unfortunately agency website design, their own and for clients, can still suffer a lot from the problems that were around five years ago. The idea that the web is a big playground for creatives needs to fall behind customer understanding and website usability. Maybe it sounds boring, but it's still possible to create websites that communicate big ideas but don't lose prospects in the fog created by long downloads, unmet needs and poor navigation.