Again, I can't argue on if the Wilson statement is accurate or not, as much as anyone else here can't, but being involved in the manufacturing of amplifiers that are in the process of changing its entire line and looking at the costs ahead and behind us so far, for things like C&C machinery, specialized booths, engineering costs, tooling, industrial design, I can tell you without conjecture it can cost close to a million dollars to bring honest products to market.
I suspect Wilson could have much more than that invested in their facilities and if one does not include all daily operational expenses, one would not be in business long, there is so much more to it than a simple equation of cost of production to retail.
So unless someone here is Wilson's accountant, we can only speculate on if Wilson's claim is accurate or not but from where I sit, I can see it being closer to the truth, than not.
FYI, I do not own a pair of Wilson speakers or have I ever, nor do I suspect that Wilson has ever used or even heard of our amps but I feel to single out a prominent manufacturer who may have millions as well as decades invested, whither or not we like the speaker and simply because some feel that an advertising statement is misleading, is simply wrong and extremely judgmental, especially without any kind of pertaining facts.
My defense is not only for Wilson but I feel it's to all honest manufacturers who have spent a greater part of their lives along with immense investments to bring products to consumers who are very happy with them, Bose and Polk included.