The use of broadband-speed Internet gets most of us accustomed to a relatively instant Internet. But then we access it on our phones, at which point the Internet can get downright sluggish. This is mainly because mobile connection speeds are quite a bit slower than high-speed Internet. High-speed Internet unfortunately makes it easy to forget about performance because the high throughput covers over our sloppy development practices. I have frequently been guilty of this as well.
Not only do we need to start testing on our phones, we need to test with Wi-Fi off. The same page that takes several seconds to load on 3G ...