As far as I can see, from some ‘locations’ available from webpagetest.org, the Connection speed option has no effect.
I tried a 1.5Mbps DSL connection limit from London (IE8). It downloaded a 2200KB page in approx 5 seconds. That’s way too fast, more like 3/4Mbps. I did the same with the 20Mbps connection and it managed about the same; 5 seconds. I’ve no idea what physical limit that location has, but the limit set by WPT seems to have no effect. I tried the same test from another UK location, Paris and Dulles. Dulles gave me sensible results. I don’t think the others did (to be honest I’ve just realised I’ve forgotten those results and I’m not im the mood to try again - London is definitely not right! I think…)
I’m going to take a guess and say the dummynet config/install isn’t there or correct? Is it possible for it to work without?
Or maybe it’s more complicated than that. I’m prepared for someone to tell me I’m wrong, If I’m right I’m suprised no one has noticed and/or commented in the forum (I had a good look) - but If I am wrong please do actually tell me and put me out of my misery.
Here’s an example: