The test looks fairly accurate to me, and would have to skewed pretty bad to make that much difference. Vibration is vibration and I'd think the 6 arms on the Monster Jax would easily make them more effective. I bet you see some changes in Sims very soon.
Like I said I used Limb Savers for years but after trying a set of Monster Jax I could tell a difference in my Bow that is the reason I now use the BowJax exclusively. Also the fact that their products has shown good durability, which has been lacking in some Sims products.
Dan