Is sour cream in super markets made in the traditional way?
Years ago I worked for Daisy Brand Sour Cream, and during the tour of their facility, it was mentioned several times that they used the original method of making their sour cream that they've used for 100 years.  I saw the cream loaded from the trucks and into various large containers for making the sour cream.

Indeed, their web site seems to bear this out.

They are the only sour cream brand that I trust when I'm cooking professionally.