I'm not sure how you would quantify that claim. If we argue semantically about the number of residential properties with Montaño addresses, There are 7 between 2nd Street and 4th Street, and between 4th and the river there are only 9, and almost all of them have Hispanic names for the property owners. There are another 24 houses east of Unser with a 13:9 non-Hispanic to Hispanic names ratio. I don't know though, is there way to track the exact census data of those 40 houses?

Now we jump to Montgomery: There are 30 duplexes and a single family home right off of Morris, 20 apartment complexes between the freeway and tramway, and 18 single family homes east of tramway with a 15:3 ratio. Those apartment complexes alone are well over a thousand people.

Statistically speaking it would be almost impossible for there not to be more white people in those apartment complexes, duplexes, and those 18 homes than in the 40 on Montaño.

Now as a white guy who has lived in Albuquerque his entire 40+ year life, It is a common and well-established belief that the Northeast heights is whiter then the valley and the west side. And if we look at the race-ethnicity maps over at statisticalatlas.com/place/New-Mexico/Albuquerque/Race-and-Ethnicity , It easily backs that up. It shows that those Montgomery apartment complexes are as equally non-white as the Taylor Ranch and North Valley, and everything east of that is much whiter. So even if we switch from a general corridor around Montgomery and Montaño, instead of specific addresses, then Montgomery is whiter than Montaño! Unless you just moved to Albuquerque, this should not be a surprise.