I think we should move away from describing VN length in hours like VNDB does, because everyone reads at a different speed. People should just give the script size or word count and let people figure it out themselves compared to something they know well (LOTR trilogy, Atlas Shrugged, whatever).
https://tlwiki.org/index.php?title=VN/Eroge_Script_sizes
Well, I was, sort of, trying to establish the proportionate relation, actually. Meaning, that
if one read E17 in 30 hours,
then I/O (read completely) would
probably take something like 60 hours from them. Also, the script sizes are frequently measured for Japanese versions only (with each kana and each kanji corresponding to 2 bytes), and, well, comparing them to non-Japanese versions of Atlas Shrugged or LOTR (in English plain-text versions, depending on encoding, each
character will occupy 1 or 2 bytes) will just be weird, since this comparison will also factor in the difference between the languages themselves. However, I must say, comparing script-sizes of the original Japanese versions of these VNs
themselves, using the link you provided, is, actually, a very good idea for establishing the same kind of proportionate relation I was trying to establish, only much more precisely, so, well, thanks, actually. It's pity that the list is not all that complete, as of this moment, though.