Perhaps 100% true when this article was written.
The better material or the bonding process allow a lighter weight shaft to perform as closely as a heavier weighted shaft. This incur additional manufacturing cost, but from $60-$500 ? A lot is in the market and the graphic on the shaft.
We can ask the same question about the pharmaceutical products. When the generic product so much less than the OEM label ? Was there a difference ? Many said there is no difference, however, there are differences between the generic and the OEM pharmaceutical products. Sometimes it's just a very minor issue which won't affect most of the users however, some cases depending on the recipients, this minor issue could be the difference between using the drug effectively as it's intended or miss the mark by a little. Usually not a big deal but in rare cases it's life and death. That's why you should always monitor your health closely after switching over to the generic brand of pharmaceutical product from the OEM brand. Especially if your life is depending on it.
So the conclusion is not whether there is a difference between a $60 graphite shaft and a $300 one. The answer is whether there is a $230 difference between the two similar profiled graphite shaft.
This is a very true statement from DC300
DC300
The big money shafts are designed around big money players, i.e., generally high swing speed. If you have it, it might be worth some if the better stuff, if not, you find what fits and go play. Sub 100mph, I'd keep my shaft choices under $50-100 in all honesty.
Of course Wishon might be addressing to the general population of the golfers.