I wouldn't go so far as to call this specific implementation a dark pattern, but it is misleading. It suggests the data updated right when I loaded the page, which obviously isn't true as I can see the same 16->17 transition on a refresh.
I'd prefer a "Data last updated at <timestamp>" indicator somewhere. Now I know it's live data and I know how old the data is. Is it as cute / friendly / fun? Probably not. But it's definitely more precise and less misleading.