This guy thinks so:
A single line of JavaScript is what powers a lot of blogging technologies these days. Widgets, sharing tools, visitors tracking, advertisers. In many cases a single line of JavaScript is all that a blogger needs to add a new technology to their blog. The problem is what happens when a lot of these single lines of JavaScript come together…
There is a well-known phenomenon in physics called non-linearity: When a lot of different things interact with each other, the outcome is hard to predict. Software is no different – when you put together a lot of components, you just do not know what you are going to get. This is because each component acts as if it is standalone, but they are literally fighting for real estate space and people’s attention. The truth is that this war is hurting everyone – the readers, the bloggers and the services. Everyone is frustrated.
http://www.readwriteweb.com/archives/how_javascript_is_slowing_down_the_web.php
