Hi MM GG,
I want to first say that this is an estimate but one of my lenders here in Northern Virginia on March 2, 2013 showed 3.75% on a Conventional 30 yr. Jumbo Loan up to $625.5K. As you have already been told this will change based on points and your credit score. Each lender will vary slightly so check with different lenders before making your final decision. Good Luck!