Well, the rep wasn't necessarily lying. Tantos are kind of what Cold Steel is known for, and Strider, along with everyone else who is using the American tanto, is ripping off of Cold Steel. Does Cold Steel complain about it? Nope. Emulation is the highest form of flattery. I won't flip out about it either, although I really dislike most of the tantos other companies come out with because they are poorly designed IMO.
The American Tanto design was done long before Cold Steel did it by Bob Lum. It's definitely not a proprietary design by any means, no matter how much you like what they've done with them.