Wow, this thread sort of exploded huh?
Put my two cents in. I think you probably over reacted a bit (you have admitted that) and in your shoes I probably would have at first too. That being said, sharing their information is their call, and canned responses, as much as they suck, are there for a reason usually.
I would say this, the cashew question wasn't a big deal and he DID tell you later, so thats cool, but the Yeast thing doesn't surprise me at all, as most places use house yeast strains and thats how they obtain and retain "house" flavors. (I would love to figure out what yeasts HalfAcre in Chicago uses).