For purposes of this illustration, I used a Samsung Galaxy S II (SGS2) running on Android 4.0.3 Ice Cream Sandwich (ICS) and the official Twitter app for Android version 3.2.2.
When Samsung introduced the SGS2 last year, they promised amazing speeds with its 1.2 GHz dual-core processor. But then, obviously, this video is a testament at how hiccups happen brought about more likely by the ever-famous Android UI lag. Look at how the scrolling abruptly stops to open the details of a tweet when you mean it to continue scroll up.
Although I sampled only a single app for this demonstration, it is in fact fairly representative of the whole Android experience — that in Android, the system responds to presses that were never intended in the first place.