Spending was muted because of the harsh winter. Recent economic indicators have been very positive so expectations are for a significant rebound for Q2.
Looks to me like it's how the government is accounting for spending in healthcare that is the biggest contributor to these numbers. Next quarter they will report big gains, just in time for campaign season and the run up to the election.
Weather and botched implementation of the healthcare exchanges probably also played a part in that. But for whatever reason seems the increase in healthcare spending will be delayed for a quarter or two.
http://www.businessinsider.com/why-health-care-spending-in-g...