GDP Data and Seasonal Adjustment

BEA appears to be doing a poor job with seasonal adjustments of Q1 GDP data for the US:

http://www.cnbc.com/id/102605010

Update:

Justin Wolfers on seasonal adjustments:

http://www.nytimes.com/2015/04/24/upshot/why-you-cant-put-faith-in-reports-of-first-quarter-economic-slumps.html