This has been the year of the Buick come-up. You ain't know? While you were lunching and lusting after foreign luxury sedans, GM's once storied brand buckled down and tried building cars that captured the comfort and driving excitement its models used to exhibit. And it's been working. For real. There's a reason it saw 60% growth over the past year. Despite being a brand that most people associate with AARP members, the product has been official. For its newest model, Buick looked to its European designers and engineers to help fine-tune its entry-level performance sedan, the Regal. Did it work? Yes. Read on to find out why.