I have serious doubts regarding how valid the results from that web site actually are. I've tested a good number of websites, forums and other, many that are lightning fast in my browser and they all seem to get almost Fs across the board.

What we see when loading sites on our computers is subjective. The WebPagetest site is objective - it's actual reality.

It's not difficult at all to optimize your site and get straight A grades.

To the OP: You have alot of large images which display small due to scaling. You should go through all of these and reduce their size closer to the size you are scaling them to, it will save you alot of KB load and bandwidth. Browsers load the entire KB size of the image, no matter how small you are scaling them to appear, to render.

Image Breakdown

The N/A grade for image compression means it didn't find any that weren't already progressive. So that's one less hurdle.

Your F grade for caching static content is a easy fix, article on that here.

Seems a sensible solution.
How would I go about doing this for images that are already uploaded?

Not sure what this means. You mean this is set during the saving process?

Thanks.

The Image breakdown link I provided shows you all the images you are loading on browsers. You can copy them from there, re-size them, re-name them to match what is on the server, then upload to overwrite.

Thanks for that Mr Taxable...
I looked through and I am at the point where if I reduce the images anymore, I will be unhappy with how they look..

I think I can live with the load speed niggle until I get another front page.

Cheers for the site link also..

I'm not talking about reducing the size you are displaying them as... The entire KB load of the large images are loading on browsers no matter how small you scale them to appear on the page.

Reducing them will have no affect whatsoever on how they look on the rendered page.