Cyber Monday is a relatively new term from the past few years. On Black Friday, brick and mortar stores pull out all the stops to bring in huge amounts of traffic and, on the following Monday, online retailers, or "e-tailers" have started doing the same. The resulting growth in this relatively nascent industry has been explosive. The year-over-year growth in spending since 2011 was 30%, and topped $1B. However, Motley Fool research analyst Lyons George punctuates this growth story with a word of caution -- that this jump was smaller than the one from 2010 to 2011, with a nearly 7% decline in average order value compared to that period. Maybe consumers are pumping the brakes just a bit.