comScore (NASDAQ:SCOR) has released some numbers about the holiday season spending for U.S. retail e-commerce spending. During teh holiday season about $15 billion was spent online, which makes it a 15% increase versus the year before. Cyber Monday accounted for $1.25 billion in online spending, which is 22% higher than last year. This makes it the heaviest online spending day in history and the second day on record to pass the billion dollar threshold. Nice job, consumers!