The data you're referring to concerns "naked" lithium-ion cells. You're missing one important factor, and that's the electronics built into consumer batteries (like the one used by iLiad).
Also, you're completely missing the fact that, as an end user, you're never even using the batteries full capacity (or charge "depth"), but about 10-15% less. That's a safety limit imposed by the charging electronics and the electronics in the battery itself. I've actually seen (and charged) Li-Poly and Li-Ion batteries used in much harsher "charging environments" (rc models) and things most definitely aren't the way you're trying to present them or the way popular myths portrait them (i.e. discharge to <25% is "deep" discharge, "deep" discharge is bad, don't discharge your batteries too much or they will die before their time).
Regarding "lots of conditions", please read the post again and notice i wrote "for all intents and purposes". Meaning "in average conditions" and "ceteris paribus".
Finally, i suggest you do some less limited reading on the subject, like McGraw Hill's excellent Handbook of Batteries, instead of partial quotes from batteryuniversity.com.
...
And, again, i fail to see the relevance to the subject at hand
No one ever said you should keep iLiad "on during the day" (again, re-read the posts).