@tomakali
I see your point. I agree the load speed in ie and FF should be tested. However, this really only tests the "throughput" of the system and the efficiency of the html/javascript/dhtml on the browser.

In other words, the "throughput" is the speed at which your entire html/javascript can be delivered to the browser.

The second factor is how fast the browser can parse and process your html/javascript and render it on the screen. This is the efficiency of your front-end see more code.

The missing piece is to test your server-side code and database queries by stress testing them with virtual concurrent users in the hundreds and maybe thousands.

I do not profess to be an expert in this type of testing. I am just shedding a light on what a typical real-world test might be, to determine whether or not 7 is faster than 6.