It rated as not mobile friendly (even if I have separate media queries for mobile/tablet).
It ranked negatively on MozRank (how well linked (?) it is from other websites, which I don't understand -- neither does it explains -- how it relates to eco friendliness). At least the main site itself is penalized by the same MozRank criteria.
Seems like a tool to generate leads to Mightybyte consulting services (who developed the tool, a founding organization behind sustainable web design).
About the manifesto I have mixed feelings, to me it feels rather "wishy washy".
Wish them luck with the project.
It also has the same bug I encounter often on full bleed designs where there's extra padding/margin that makes a horizontal scrollbar visible. Which reminds me that even experienced designers still don't have a good grasp on CSS /s