While you might think that low interest rates or lower fees and closing costs are among the most important factors when it comes to a mortgage broker selecting a wholesale lender for subprime or Alt A borrowers, you’d be wrong. According to a new national survey, “How Mortgage Brokers View Nonprime Lending and Specific Lenders,” the highest rated factor for broker selection of a subprime/Alt A lender is a “sales rep returns phone calls and…