I think she just didnt realize O% and skim are the same. Different dairies use different names on the containers. By shopping at various stores, you will see both used. Also, years ago, we used the term skim and now they say no-fat or non-fat.
I used to think skim was watery and almost translucent. But now that is all I purchase and I dont feel that way. I dont know if the processing has changed over the years.