Same as Brocnizer's. If rates stay low, then a smart thing to do is to consolidate into a 30-year payment, pay the minimum amount each month, and then put the rest that would have been payed if a 10-year repayment had been done and invest that.
For example, with Sallie Mae loans, they knock 1% off after 48 months of continuous payment, which drops the rate down to 1.77%. Then, if you do direct deposit they knock off another .25%. That brings it down to the 1.5% range, which is absurd. So, if you can find an investment that brings in a minimum of 4-5% on a continual basis, then it would be ridiculous NOT to invest the excess funds after paying the minimum loan. That is, as long as their are methods of investing that easily eclipse the 2-3% loan interest rate, then money is to be made.
Essentially with rates this low people who choose to pay off their loans quickly rather than taking their time and investing the monies they would have used to pay off the loan are actually losing money.
The catch/trick is that you MUST invest the loan funds rather than spending it. If you were to spend it then you would be much better off of course just paying down the loans in 10 years. But if you can invest then you are far better off paying the minimums for 30 years and investing the extra funds you had set aside for payment.
I worked it out and on a bad investing year it turns out that the person who pays minimum payments for 30 years and invests the excess would stand to gain around $500,000 in the long. That's on a bad year.