Great article, thanks!

I understand how I can use simulated “slow” network — the app will load slower, images will appear pixel by pixel, etc. and I can act accordingly. But how can I benefit from such a low-level specific things like packet loss and packet duplication? Will it result in just the same “slow” network, so I will not notice any difference between “slow 3G” and high packet loss rate using sophisticated tools, as a web developer?

Also, you announced a demo app in the beginning of the article, can not find it )