The reason why I'm concerned is that various marketing experts are saying that google does rank you lower if your site is slow. In a similar way to the fact that google will rank you lower if you have http and not https. Even if you are not collecting data via web forms and so don't need https, your site will still be ranked lower. Similarly, I'm happy with my site in that I feel people that are loking for my services are speeding through it and so are happy to wait a few seconds for it to load BUT me being happy with the speed and google being happy with it are two different things :-(