"We are certainly gaining a reputation on the PGA Tour for having the most accurate shaft in the game," stated Dr. Nataliya Hearn, CEO of e21."
This is not fluff, this thing is real and once it catches on this could be huge. The next few years could really prove to be huge for this little company with a really great product.
PGA players do not switch to equipment that is not top notch. They switch equipment when they believe they are gaining an advantage on their competition. I would not doubt if a Callaway, TaylorMade, or Cleveland type company started putting these shafts into some of their clubs.