I know this is what lender/credit cards companies use to approve/deny credit. Both my brother and I are buying house this year or next year. My last credit score as of 7/01/09 was 751, while my bother was 624. This is the avarage of all (3) major credit boreaus. We both got pre-approved at the same interest rate. We make practically the same about of money. While I'm happy my bother got a good credit interest rate, I still dont understand why he was rated as a good as me becuase of the big gap in terms of the credit score.
Your credit score is one factor. They can also look at your existing debt, savings, assets, income, employment stability, etc.