Liz: Average means that 50% take more time, 50% take less. There are different DOM for sales, sale pendings and available categories. Why do you suppose that is true in this market? Why is DOM for available usually LONGER that DOM for sales? It's true! I can think of a good reason, can't you?
Anyway, DOM is a bad tool to use for much. It reflects the past market behavior but what will be the use of past behavior if the market gets really HOT tomorrow? OK, not tomorrow. How about next week or 17 1/2 days?
You need a Realtor with a bunch of experience to interpret what you should expect in any individual situation. Averages don't do it.