//Any other than anecdotal data to back up/explain this? What locations?
Did they actually fire the other workers or did they transfer them to stores where English would be the primary language spoken? Seems to me Walmart's trying to make a buck. If the clientele is primarily Spanish speaking, it makes sense that many of the employees would be as well.
I'm no huge fan of Walmart. Except a few very specific packaged food items, we actually buy very little from there. However, I get suspicious when I hear claims like they "fired the white workers."
I don't know - SaraJohnson originated the thread I responded to and may not have any real info. As you indicate, it makes no sense to fire English speakers in favor of Mexicans without a reason - they have to pay comparable wages/benefits (and they would have their fannies sued off if they did as what was claimed) so if anything like it occurs, it must have some sound business rationale.