There is no "surplus". Just the lowest deficit in four years - which isn't all that much to brag about...
It will end up being pretty brag-worthy I think - the FY deficit will probably end up being well short of 2% of GDP, which means that GDP growth will be considerably faster than the growth of debt.
When ability to pay grows faster than debt, thats a good thing. The US was there unquestionably since FY2004-05.
Not as good as a balanced budget, but the real bleeding has stopped.