I know it's common to say bandwidth casually, but I really wish a Blog trying to explain the difference between data rate and latency would not conflate bandwidth and data rate (one could also say throughput or capacity although the latter is also technically incorrect). The term bandwidth really denotes the spectral width occupied by a signal, and while it is related to the actual data rate, it is much less so nowadays where we use advanced modulation compared to back when everything was just OOK.

Coincidentally, the difference between latency and data rate is also much clearer using these two terms.