I went to the site, but there was no image, it said there was no data for the D800(e) below ISO 200, so I'm wondering whe the chart shows a curve belowISO 200 attributed to the D800(e)
(e) denotes estimated.
So we have a curve made up by a Nikon site that is faked?
Not something I'd want to spread around.
It's not faked.
"There is no data yet for the D800E below ISO 200." From the page linked to.
Yet, they show a curve below 200. I guess you would call that curve a creative estimate?
The graph is correct. The sentence you quote refers to ISO values, not their presentation on the graph.
Thus "ISO 400" is not below "ISO 200", it is above it.
"ISO 100" is below "ISO 200" and indeed is not present on the graph.