Multiple bidding in a low inventory environment continues to lead to shorter days on the market. About 37 percent of REALTORS® reported that in March recently sold properties were on the market for less than a month when sold compared to 27 percent in the same month last year. The percentage of REALTORS® reporting that the house sold had been on the market for 6 months or more is down to 20 percent from 28 percent a year ago. This information can be found in the March REALTORS® Confidence Index (RCI) Survey report.

Source: http://economistsoutlook.blogs.realtor.org/2013/05/10/thirty-seven-percent-of-homes-sold-in-less-than-a-month/