short overweight ladies (and men) I saw in the streets
This is true about alot of Mexicans, especially those with a preponderance of Native-American ancestry, but thankfully for them they don't all buy into the European notion of bodily aesthetics and so they find one another beautiful. However, even if we factor in these squat Mexicans the average of beauty in Mexico is still quite high, even by European standards, given all the stunning lookers an admixture of Spanish and Indian blood produces. See D.H. Lawrence's novel The Plumed Serpent
for an Englishman's take on the special charms of the Mestizo.