Forum Moderators: Robert Charlton & goodroi
I've seen a few cases where the company is a household name but the domain name is an abbreviation of that I've seen nowhere else. All in the financial services sector, and all big names. They don't seem to do as well as companies that have the household name single word for their organisation directly visible in the domain name.
The 90% figure is probably because they purchased the domain name and SEO'd it all-over (it is more likely someone who knows about SEO would purchase a domain name for SEO purposes) and would'nt base those rankings on the domain name being too much a factor.
It probably improves it somewhere somewhere around as much as having the page title on topic - or even just the filename.
I personally would worry more about humans being able to remember/type it easily before worrying about Google.
IMO if the keywords are parsed by G and the parsed words match the search term (in the exact order) then the domain tends to get ranked well, often at or near the top. This is especially so on long domains which contain 3 or 4, or more keywords. The more keywords that are successfully parsed the more likely that will occur.
Of course, type-in traffic will also be there if the name exactly corresponds to what the visitor is looking for. And as Haecceity mentioned the anchor text in links are a valuable benefit too.
Keyword rich domains are the major consideration when I register domains.