Yep. Just remember to wrap your smartphone in tin foil, or crawl into the freezer, before you search for sensitive terms. Otherwise Big Brudda will get you!
In her case, Big Boss. The reality is that work computer traffic is routinely recorded, and searchable in a few seconds, in a way that work phone conversations are not. Even when recorded, phone conversations are a pain to monitor - voice recognition is at its infancy, and transcriptions are hit or miss, meaning that searching through phone conversations means listening for hours and hours, vs a few minutes worth of glancing through keyword searches for computer traffic.
I was extremely skeptical about the NSA siccing anyone onto this couple. There have got to have been millions of individual searches on the keywords since the Boston bombings. There is not enough police manpower to do these operations and conduct normal policing duties, not to mention the hue-and-cry, when hundreds of homes in the average township are besieged by assault rifle-wielding SWAT teams. Going back to my original point, anyone who wants to use the internet for non-work purposes during work hours should get a smartphone, and avoid the siren song of the company's free WiFi network.