I agree that Ashton Kutcher was embarrassingly awful in that commercial. I agree that the accent was ghastly and the entire delivery was just horrible. It was so bad I had to watch the stupid thing four times to get the name of the product he was hawking.
It was even worse that those 1940's movies when every time some White actor in bad Chinese make up appeared on the screen, the soundtrack would do a "chingy, chigy ching ching" riff.
I find the use of the term "Asian" to be rather vague, since it could refer to a vast number of diverse nationalities: Azeris, Armenians, Israelis, Iranians, Kazakhs, Nepalese, Cambodians, Buryats, Turkmens, Kurds, as well as Chinese and Indians.