US online retail (non-travel) spending reached $44.3 billion during Q1 2012, representing a 17% increase from $38 billion in Q1 2011, according to estimates from comScore. This marks the 10th consecutive quarter of positive year-over-year growth and 6th consecutive quarter of double-digit growth rates. The 17% year-over-year growth rate is also the largest for any quarter since Q4 2007. On a quarter-over-quarter basis, e-commerce sales fell about 11% from $49.7 billion. However, comScore historical data shows that e-commerce sales generally peak during the fourth quarter due to holiday spending, and the decline is slightly less severe than the 12.5% drop experienced between Q4 2010 and Q1 2011. Read the rest at Marketing Charts.