I think it is a valid discussion. The iPad's iOS, a relevant comparative, IRC uses about 2GB for iOS and scratchspace. So if you buy the 16GB or 32GB you get about 14GB or 30GB of usable space or thereabouts. It is approximately the advertised storage space. Let's use the 80:20 rule and allow for 20% disparity.
However, the Surface is quite different 32GB giving you circa 16GB usable space means 50% lost. This is a binary order of magnitude (2x factor). And a reason to be unhappy about the accuracy of the sales specs.
... some things in life just drive you bonkers. Especially the rubbish you see in forum posts