This is absolutely true, in my very first job out of college I turned down the initial offer and asked for more money, they gave me 7500 more base salary, and b

This is absolutely true, in my very first job out of college I turned down the initial offer and asked for more money, they gave me 7500 more base salary, and by my first eligible performance review I got a 7.5% raise on my base salary. Always negotiate, it can only help you.