The speculation first began to swirl Wednesday, when it was learned that Kurt Busch had flown to Las Vegas for Champion's Week festivities not on a private jet, but on a commercial aircraft out of Charlotte's airport. It ramped up Thursday, when many were wondering why Busch's ever-present public relations manager hadn't accompanied the driver to the National Motorsports Press Association/Myers Brothers awards luncheon. And it reached its peak on Sunday morning, when all indications began to point toward a split between Busch and Penske Racing, his team of the past six years.