I hate to keep bumping here, but this is one of my favorite topics (both the Randy Anderson/Primos calls-big fan, and the custom vs. factory debate)...
I absolutely agree, the factory produced calls just don't stack up to the standard of quality that our custom turning brothers produce. I can both appreciate the craftsmanship of custom "production" calls, as well as the mastry of industrial production that goes into producing high volume "factory" calls. I have 3 Primos/Randy Anderson Double Cottontail distress calls, I bought them several years spread out, from different stores in different states, and they all play the same, and more or less sound the same.
I stand somewhat in awe of producers that can generate the SAME THING hundreds and thousands of times over, just as I stand in awe of the master wood-turner that can produce one of a kind pieces of art from a 4" length of 1.5" blank stock. I work in the Ethanol industry, so "knowing beer" is sort of a required hobby, and the fact that EVERY CAN of Keystone Light tastes the same is amazing considering the opportunity for variability in that process. Equally, not every JC double cottontail reed is exactly the same, and not every batch of laminated hardwoods will be the same, so getting the duplicator to turn the exact same shape and exact same, then getting the same sound out of these calls really impresses me. Sure, the "factory process" turns out what I'd call an "average call", since they're going for a high degree of repeatability with minimal overhead and minimal unit cost, but I'd say that Primos does a great job at MASS-PRODUCING an "above average factory call".
Then again, not all "factory calls" are made without high human touch. I HAVE seen the "birthing process" of Verminator Syco Tweety's before, which is FAR from a purely mechanized process! Very comforting to know there is a little dash of "Rick Spit" in every package!!!