It is known and the nuance is not a surprise among Hispanics.
I grew up with many Asians and it is my experience that they also, within their own communities, openly speak of a perceived hierarchy among themselves. I think if you ask the average Asian who, within their community, claims superiority most would point to the Chinese. That is my experience in talking with Thai, Vietnamese, Koreans, and Japanese etc. friends. I've also noticed that Filipinos will sometimes identify as Chinese Flip as opposed to just saying Filpino.
Common generalizations/criticisms that I have heard, even recently among the Latin community, includes viewing Cubans as complainers and having a poor work ethic due to decades of minimal work experience. Contrast that to Cubans who have grown up here. Boricuas (Puerto Ricans) and Colombians often have the gift of the gab but one should think twice or at least be careful if doing business with them as they are not the most trustworthy and are more talk than substance. Venezuelans, who once thumbed their nose at the Colombians, now are the butt of Colombian jokes. Hondurans and Guatemalans are hard workers but not the sharpest tools in the shed, also they're short. Just give an Argentinian a few minutes to remind you that they are more European than they are Latin, lol;) also, their women are crazy. No one really discusses Costa Ricans except Bolivians. Is Brazil even Latin? They don't even speak Spanish. All joking aside they are unique and are the only economy that can is larger than Mexico, but the language barrier is just that a barrier. Mexicans are often discussed mainly because they get they represent the largest group in the U.S. and have a long history of being in the news for southern border issues, hence it is obvious why these groups trying to distinguish themselves from Mexicans.
Even among Mexicans the infighting and claim to superiority is known. If not because of class/fairness in skin color, as others have mentioned, Regios(Monterrey) will go to their grave as superior to Chilangos (MxCity). Both tell those from SSHihuahua to SSHutup and simply have more daughters. The Sinaloans are the Guatemalans of Mexico as they are not so bright. Oaxacans are the Iowans/Nebraskans of the group. Sonorans/Coahuilans are the ranchers of the bunch etc...And everyone in Mexico and I mean EVERYONE knows that those from TaTaTaTamaulipas are a different breed. Damn! (Don't get me started on defining the differences/contributions to the menu of Mexican food. For example, Trompo or Al Pastor? Whats the difference. Depends on the region. You would think it is obvious quesadillas, have cheese. NOT so fast! Ask a chilango. )
Individual differences among the Latin community is vast. I giggle when I hear leaders of the black/latino community say if only we could unite the black and Hispanic voice. Thats not the tie that binds. If only there were some good ideas that are.