The one glaring surprise in this article is that the author thinks "excuse me" in US English is used as an expression of politeness. Usually it is used in the opposite way, as an innuendo which pretends to be polite on the surface but really means "hey, you are being rude by blocking the path / taking up too much space." If you don't believe me, pay attention to how it is used when walking or standing in a crowded shop, subway platform, or sidewalk in any crowded area of a US city. Especially listen to the tone of the words. When these words are used, it usually is not with anything near a polite tone.
"Pardon me" and "sorry" on the other hand are, in my experience, used politely.
"Pardon me" and "sorry" on the other hand are, in my experience, used politely.