Do you mean you're trying to verify if it's true or not? I have no idea where to find that information except to run tests. It's certainly the first I've heard of it, and the original statement states it as fact without backing it up.
I'm not surprised it's confusing to you or the camera store people. It's a confused statement.

The original statement, taken as a whole, indicates to me someone without much real knowledge. It just looks like another bogus statement based on incomplete knowledge and/or half-truths and/or faulty understanding and possibly the desire to claim devious behavior on somebody's part. It sounds good on its face, but I doubt it will stand up under scrutiny.

I think the fact you have never heard or read of it tells you just about everything.

If some company did label one film with different speeds to fool people into thinking they're getting something they're not, especially given that higher speed films usually cost more, it would be detestable. Also, IMO, legally actionable.

yep, that is what i was trying to do. I thought it was outrageous to state something like that and frankly based on other comments from this person my feeling is they really have a poor background of knowledge.

it is amazing how much BS can be found these days.

Also, no one else called him on this bit of information, which i would have done, but wanted to do some research to be sure i had my facts correct.

thanks for taking the time to response to an older thread.