I bought a sleeve of the new AVX balls. I compared them with my 7 and 5 irons over many swings on my launch monitor in my garage. The AVX consistently gives me 10+ yards with the sam swing speed compared to the Pro V1. My carry distance with the 7 iron went from 155 to 165..same 81 mph swing speed. The RPMs were nearly 2,000 less at times---same club same swing speed.
I used them on course today---real world results. I came "this" close to jarring and 8 iron from 151 after the ball hit and jumped toward the cup and stopped 6-8" away.
Titleist has a real winner here.