I have. I see a fig tree with figs at most nodes. Nothing unusual. His Smith has short internodes, creating an impression of very heavy fruiting, similar to what I had in the first year. His are smaller trees than mine in height. My second year Smith grew about 7.5 tall and 6 feet wide, with figs at every node on about 16 fruting branches. I don't know how you measure productivity, but getting over 200 (I counted roughly 230-240) from a second-year Smith in a pot is pretty darn productive in my book. Looking at his Smith trees, I didn't see one with that many figs.
We can keep arguing over this for a very long time, but I don't see the point, so I am going to end this here. We all choose to believe what we want, and interpret the data that we see how we want. "mjs" Smith sells at 2-3x the price of regular Smith. If one believes in its magical powers and feels the premium is justified for this 'super strain', well... it's their choice. But me, personally, I don't see anything special about it.
Some pics of my second year Smith Ordinaire, from a cutting I paid less than $10 for on FigBid.