I call BS on these numbers. I work in computers. I live and breathe computers. I have NEVER seen a Chromebook in the wild. Never.
Me either. And that includes walking around the campus library, cafes and communal areas, and even the local mall with people using their laptops on the Wi-Fi at the mall coffee shops. Without any prompting from me whatsoever, my father, sister and one of my friends bought new MacBooks, either upgrading their existing laptops or switching from a PC.
I sit in the vicinity of our Helpdesk and I hear them help people (students, staff) all day long with getting their devices onto the Wi-Fi network (mostly because the SSID is non-obvious for a bunch of uninteresting reasons). It's all Windows PCs, MacBooks and iPads, with an occasional Android and, once every couple of weeks, a Windows phone or tablet.
I realize an anecdotal assessment might be unsatisfactory. So, how about some stats? According to our helpdesk database, we've helped with exactly two (2) Chromebooks in the last 18 months (40,000 students), both Wi-Fi assistance. On the other hand, we've helped with 20 pure desktop Linux machines, covering VPN and Wi-Fi connections. Our KB database doesn't even have a single Chromebook/ChromeOS article in it. The KB annotations list a query from a support agent about whether we need any ChromeOS doco, and the response from the Helpdesk Manager is that the effort involved far exceeds how often it ever comes up.
Our web analytics also reports ChromeOS usage so low it falls into the 1%-"Other" bucket.
So, yeah, I call BS and shenanigans on those numbers too.