While downloading the recent WoW patch I noticed that the displayed download speed was inaccurate. The patch downloaded in less than 5 minutes for me, despite the download speed displaying as in KB/s and B/s. It seems that the downloader is simply using the wrong units, displaying KB when the speed should be the same value in MB, and displaying B instead of KB.
The bug doesn’t impact my user experience; I’m submitting this report for your records.