If it's covered up by flavoring/sugar, then it may be hard to notice the difference. But if you just have vanilla or chocolate (with chips, nuts, etc.) then I think it's pretty easy to tell the difference.
In addition to some of the premium brands you mentioned, are there other even higher-end labels? And what is it, experientially, I should be looking for? What are the signs, good and bad, in the ingredients list of proper ice cream?
I still felt a rush when I wrote those lines, and its been 5 years.
I look for the fewest ingredients. If I see preservatives or coloring I generally don't buy it. Haagen Daaz is one of the few national brands that is really good about that. Jeni's is really good IMO
She is the founder of Jeni’s, which is probably the highest-end ice cream I’ve come across.