I hope you are enjoying Valle de Bravo. I'm up here in Atlacomulco de Fabela and I haven't run into another native English speaker or foreigner in the last 5 months.
I don't hang with many well-off Mexicans, but the few I know don't speak English, I'll have to ask my boss la directora de investigaciones, she has a PhD but she did her research in Mexico. Tons of people want to speak English with me, they are eager to initiate English. Back when I was taking taxis everywhere every 3rd or 4th driver would try their English with me "I worked in XX state for YY years....", also my fellow English instructors who are nuts to speak English, not to mention my neighbor whose boss is the local mayor and when he told her my Spanish was excellent she got so jealous.
Anyway, Valle de Bravo is at the southern edge of Mazahua country (hnatrjo). This whole area is diverse and culturally rich. There are 5 indigenous languages in this area and they are all Otomanguean except for Nahuatl.
Yeah, Mexicans have a thing about French. More cultural baggage I'm afraid.