If he had a variable mortgage, his payment would have went down. He more than likely signed up for a new mortgage recently and had to swallow the higher rates (compared to 3-5 years ago).
There are some scary stats out there, such as 85% of the mortgages coming due this year will be beyond the budgets of current homeowners, even with the recent rate drops. We signed a new fixed mortgage in April, which was right before the rate drops, but our mortgage is relatively small and was easy to adapt to. For many, it's going to be untenable.