That version is more like Moo Shu Lu (gravy style) and pretty common at Americanized Chinese restaurants too. Traditional style is pretty much dry with scrambled eggs. Ive never stepped foot in a Panda Express. I do love some Americanized versions of Asian food though. I adore good hot braised chicken or pork. When its made right hot and sour soup is the bomb when you have a cold.
The real classic Chinese "taco" is roast duck with the little steamed flat buns. Ive had them with red cooked pork also at the "authentic" places in town. Man do i feel sorry for you guys that dont have restaurants that serve REAL Chinese dishes.