I have been going here for a long time. I have also been to many other Asian restaurants in the US and in China and I do not care about the service being sub par to common American/Canadian service which I find at times to be overzealous and annoying. I enjoy the food and the prices at King Noodle but I will never be back again.
The last time I went and was confused about where to sit, I did not speak Chinese back to the waitress. She called me a "Slow Idiot" loudly in Cantonese figuring that I did not understand her.
On another occasion when I was paying my bill a waitress said "This is the bill, but does not include tip"
She knows that you are not supposed to tip Chinese restaurants like this one. That is why she and her friends are allowed to be so rude to the customers, throw their ordered food on the table and pretend to ignore them. Furthermore, why would I want to tip her anyways, treated me like trash?
NOTE: for those who are unfamiliar with this culture - you are NOT supposed to tip in places like King Noodle when the service is noticeably rude. [side note: I am not saying to NEVER tip in ANY Asian restaurant. Just don't tip in King Noodle] Places like King Noodle do not rely on tips to stay in business and are keen to take advantage of the generous American/Canadian culture to amplify their profits.
My suggestion for tipping at ANY restaurant: Does this service that I got today deserve a tip? And how much? Then tip that amount.