A WebmasterWorld thread named Ads not reviewed for one month shows how several Google AdWords customers are complaining that it can take a month or more for Google to review any ads submitted that require manual Google review.
Some AdWords advertisers say that this is a "trend" he has been noticing in the past several months. The you have to "get back in touch with them and 'prompt' them to approve ads these days," he says. It is kind of like calling someone to make sure they got an email you sent them.
Pretty poor customer service, from the looks of it.
Forum discussion at WebmasterWorld.