I got the same impression after reading the post and before looking at the HN discussion. Good to see I wasn't the only one.
Initially I was horrified by the blog post because we now know for certain that google search histories are readily available without warrant to certain subsets of NSA analysts. Then it hit me that the blog post content and timing was too perfect. If such an uproarious event happened to the author, why on earth hold on to the story for "a few weeks"?
Who knows, maybe the author's husband did get searched and she's only assuming it was related to interest in pressure cookers and backpacks. I have no real reason to assume the author is lying, but I also don't have to assume she's telling the whole truth and not just trying to attract page views.