There's no objective measure of what site is 'good', and what site has been 'SEO-gamed' to rise to the top of <arbitrary search engine's algorithm>. The measures are subjective, and people complain when changes to the algorithm aimed at punishing black-hat-SEO also punish their website (Rightly or wrongly).
Not to mention the problem of using black-hat-SEO to punish a competitor (By creating scummy links to them, that make it look like they are trying to game the search engine.)
... 100,000 words later ...
I don't think it will be very hard get right.
A very very significant example is the primary language group exposed on the site.. for example, Cantonese ? I personally support the rights of "minority" languages like Gaelic and Welsh in the European setting, Tamil for South Asia, things like that.. make it so..