The fact that a lot of Chromebooks are being sold is fairly solid; I would reckon that the questionable claim is that Chromebooks have strong sales traction with retail consumers. I bought myself a Lenovo Duet tablet last fall because I wanted a device that could last multiple days with intermittent streaming use and I missed the feeling of a cramped 10" netbook. I got it on sale for $200 USD and was floored by how nice the experience was on a PC that cheap. But friends and family who saw me with the tablet were shocked that I, an adult who likes computers, owned a Chromebook. I only know one other person IRL with a personal chromebook, and they bought it after being given a school-deployed one in college.