OK, actually, they did not use the words "trivial" and "unmeasurable." But they could have. What they actually said in a story splashed across the front page:
The 16-day government shutdown cost the economy jobs, delayed mortgages and lost retail sales — at least $12 billion worth, and maybe as much as $24 billion
$12-24 Billion is between 0.08% and 0.15% of GDP. This is for a shutdown of the government for 4.4% of the year (16 days divided by 365). That hardly seems like a substantial impact, and not at all in line with the scare stories in advance of the shutdown. (And this is coming from someone who was impacted a lot, though due to illegal actions by the administration).