I personally can't rationalize skipping the "review" part of the cycle. If it faces the customer, it's my responsibility and the luxury of not looking at it seems like trading away effectiveness for efficiency.
I see your point. I also take on design roles, so I naturally do that extra double take on the work during the design phases. Though I generally find the tests really do a great job of covering what they should.
If you are working with larger teams with designers and developers, I suppose it may not work out as well.
If you are working with larger teams with designers and developers, I suppose it may not work out as well.