When your browser ask some web server for page, web server answer with HTTP status code. It looks like “HTTP/1.1 200 OK”. There exists only one connection. If page is in browser cache, browser should ask by “if-modified-since” header and web server may answer by “HTTP/1.1 304 not modified”.
For Google domains, which contains all keywords are better. More keywords in domain is always better, importance is 12 – 17.1%. Keyword in URL has almost minimum importance 0.7 – 2.7%, but more means good.
Google position depends on loading time. Greater time is bad, its importance is 12.7 – 17.8%, it differs if you use top 10 domains or not. Do you think, that you have fast pages? Are you sure? I have bad news – maybe even you were cheated.
Google position is connected with URL lenght. Greater lenght is bad, its importance is 11.19 – 11.82%. But there is a problem: All youtube videos has url lenght 42 (ultimate answer in Hitchhiker’s Guide to Galaxy). It is maybe nice easter egg but it makes my results and graphs bad.