Thanks for the input folks. I cannot respond to everyone, all in one post. Here's my take on a few topics that have been brought up.
RE: Liability Issues
I honestly don't see any real liability issues with disclosing more information, since there are no regulations that they are subject to. If a knife breaks in use and maims or kills the user, then they will be open to lawsuits, no matter what their specs say.
Benchmade is making the hardness specification for their knives public. To my knowledge, they have not had any lawsuit issues. However, they did have a public relations issue when knife owners found out how soft the initial heat treatments were.
They are offering free replacement of 3V knives that don't meet the current hardness specification, even for knives that were heat treated to a lower hardness specification.
RE: Unreasonable Burden
Producers already list the materials and dimensions on their websites. Benchmade has started listed hardness. Adding a few more lines to the existing specifications list, doesn't seem unreasonable to me. Any reputable manufacturer should be able to control hardness and toughness of forged or HIP powder steels to within a relatively narrow range. IMO, this is the type of info that can help differentiate a manufacturer that charges more for the same materials.
I do find it incredible that a some manufacturers don't list blade length and functional handle length on their spec sheet.
RE: Blade HQ and Other Retailers
I am glad that retailers, such as Blade HQ, sometimes provide information that that manufacturer's do not provide. Everything else being equal, I am more like to buy from Blade HQ for this reason. However, you cannot expect them to provide information like toughness or CATRA test results.
RE: What Larrin is doing at Knife Steel Nerds
I agree that Larrin's work is great... and probably the best thing going at the moment... but it is still limited. From what I can tell, most if not all of Larrin's samples are not heat treated according to any manufacturer's specs. So, his test results aren't necessarily representative of any particular production knife. Manufacturers probably aren't going to share their proprietary heat treatments with Larrin.
Manufacturers should have their own data on actual production samples that they could make public. The way I see it, Larrin's work should help you develop a short list of materials to look for for a given application. The manufacturers should provide information on their products.
RE: Channels like Cedric and Ada, Outpost 76, Tom Hosang Outdoors, Super Steel Steve, and now Alex Steingraber
I agree that these channels provide some useful information, especially if your primary concern matches testing (slicing cardboard, cutting rope, etc). Less useful for other applications. OUTDOORS55 has a good "rant" on this subject, which I recommend for anyone that views testing from the channels listed above. See:
RE: Up-selling Expensive Steels
I am astounded that manufacturers seems to be able to up-sell people on more exotic steels without providing any actual quantitative performance information. You think that they would be able to sell more, if they could actually quantify a performance benefit for the higher priced versions. Meaningless terms, such as "NASA", "high", "great", and "extreme" are not going to persuade me to open my pocket book.