The R&A has had capabilities at previous Opens to test drivers for COR (coefficient of restitution) and CT “characteristic time.” In laymen’s terms, the spring-like effect of driver faces. But the governing body is becoming more proactive this year.
“We’ve always had an equipment test capability down on the range, certainly since I’ve been involved in the Open,” Slumbers said. “It’s been an option for players or the manufacturers to take their equipment in and have it tested. We felt it was an appropriate next step to more actively seek to test players’ drivers straight out of the bag.”
And from the transcript, it's worth noting that Slumbers sees the players as having a positive impression of the R&A. Whether that means in contrast to the USGA or in general, I'm not sure.
It was a request to players, and I think many of you underestimate, we have a very good relationship with our players, and it's a very collaborative relationship, and we had absolutely no problems with the players coming and were interested in what we're doing. A lot of them actually wanted to know how does the test work, and what is it really testing for?
I'm sure they loved giving up their drivers and their caddies to go find out if their club is conforming!