[Adam]

That is a Firefox only trick, unfortunately.

It doesn't work for people with dialup connections (the default pipeline max-requests is 5 or 10, which is the maximum that a dialup connection can handle), but people with faster connections than a typical DSL/Cable connection can boost this number even higher than 30... but if you're already faster than DSL, then you don't really need to worry about page load speeds, now do you?

I don't know if these types of settings are available to people running Opera or other browsers, but it is very unlikely that anybody will be able to get to these settings by using About:Config. These settings are completely unavailable to anyone using Internet Explorer or any other browser using the Trident engine.