Page rendering is not particularly computationally intensive. Unless you you trying to render a badly constructed page containing a lot of JavaScript and Flash animation, page rendering speed is a slowly varying function of processor speed. The connection speed between your computer and server is much more important.
I think most of the time, page load times are greatly influenced by the skill of the programmer that created the website. Obviously fast connections can help, but there are some websites that are really poorly written and it shows.
Page rendering is not particularly computationally intensive. Unless you you trying to render a badly constructed page containing a lot of JavaScript and Flash animation, page rendering speed is a slowly varying function of processor speed. The connection speed between your computer and server is much more important.