This exactly. The big jump I mentioned over that 7 year period did include Tiger's entrance, and a prime Daly, but they weren't a big enough sample to move the average. The average move happened because people were starting to see how big of an advantage distance could be so they put more time and work in, and because of improvement in equipment.
It hasn't moved much in the last 15 years because many people are just trying to keep up (working out and focusing on trajectory and spin rates) with the top of the pack. It's pretty tough to hit it 300 yards and keep it in play, and that's why I think that gains have trickled off. We still see small gains because more of a percentage of the tour has distance as a goal, and guys like Fitz and ZJ are becoming more rare. Those two come to mind as guys who admit to just being shorter, accepting it, and improving other parts of their game.
Looked at the X3 page, the X3 uses the fusion technology, so guessing some of the features on the X3 are going to be on the M+? If I had more time, I'd cross out the M+ data points and just guess from which ones are left over.
Or maybe it's more accuracy?
Or maybe chipping/pitching related.
Don't even know how to describe it, but I open up to play a flighted wedge that will hop and stop. just let the hips and legs provide all the power, with the hands simply hinging and unhinging, naturally to a low follow through..
Most wedge shots I will play with a square face to simplify alignment, and I will change my 54 degree (my workhorse wedge) from a 10 degree bounce RTX to a 14 degree Vokey when facing very soft conditions or a very lush course.
I will intentionally put draw spin on a wedge into a good wind, or when the pin is well left and I want to get a good bounce and a bit of run upon landing or on a shelf I don't want to fly to then suck the ball back onto the lower level.