i think its true it will be plus point if Keyword matches with url. I had register a domain, it contained nothing, i submited on google and it ranked top of all the sites before it............so it really matters and also The age of the domain is counted in search engines older the domain better the rank!
Thanks for the Green Coby The bottom line with everything related to SEO stuff is this: If it won't get you banned and can help you, then use it!
No. But if you work hard on SEO it will help. Keywords in url is one of the factors google use to rank your site.