It completely depends on who you are going through. There is not a standard time that it will close. Ask your realtor up front for an estimate. My realtor Lebo group (http://funadvice.com/r/15d29vtntv6) is always able to answer all of my questions regarding houses in the current economy.
I have bought them in three days myself, must be a difference in the title companies
No, i found out today that it's about 3 weeks. Because we put an offer on one.
not counting the time your bank needs for the loan, it takes about 3 days