US online retail sales grew 12.6% in 2010 to reach $176.2 billion. With an expected 10% compound annual growth rate (CAGR) from 2010 to 2015, US eCommerce is expected to reach $278.9 billion in 2015. Several factors continue to propel double-digit growth for the web channel: ubiquitous web connectivity among consumers, increasing consumer familiarity with and preference for online shopping (and the subsequent cannibalization of store shopping), best-in-class shopping experiences even in the long tail, and new online shopping models such as flash sales, which have generated excitement and grown rapidly.