Sidetracking just a bit, part of the problem is many people don't know how to write a recipe down.
- Many of our non-U.S. CC'ers have questioned "how much is a 'stick' of butter?"
- There have been threads that point out packaging is getting smaller so "a can" of this or "a box" of that just isn't accurate anymore. (Not that it was to start with, since the user doesn't know if it's a big can or a little can!)
- Dont' EVEN get me started on the "capful" measurement!

- Lots of threads questioning when flour should be sifted .... before or after measuring?...... or not knowing what it means between "1 cup flour-sifted" vs. "1 cup sifted flour".
I've edited a couple of cookbooks and it was the most frustrating part of the job to track down the recipe submitters and ask "what the heck does THIS mean?"