kenner
Didn't seem to bother Pat Perez the first few days. In his post-round interview today - he said he loved these greens, that he was able to be aggressive because they weren't super fast.
The greens in the Open Championship are generally slower and more bumpy. I think every player going into the British Open accepts this. Yet the major champions of this event make the needed adjustments and figure it out after a day or two. Els back in 2012 at Royal Lytham... Mickelson at Muirfield back in 2013... Rory at Liverpool back in 2014... Zach Johnson in 2015 at St. Andrews.... Stenson at Troon back in 2016. Spieth last year at Birkdale.
Slower green speeds allow a player to be more aggressive/confident. A firmer stroke can take a little of the wobbliness out of the roll.
It's not the US Open, which has traditionally been a completely different test tee-to-green.
And quite frankly - I like this aspect about the British Open. The "trickery" is based on the tee shots (avoiding the fairway bunkers), and then the approach shots (avoiding the green-side bunkers). If you successfully navigate those two aspects - you've basically secured par, barring a ginormous brainfart. It's not a putting contest like it has typically become in the other majors. Yet making putts is no less important.
I guess what I like most about this tournament is that the requirements placed on the eventual champion are very balanced. The ability to adjust to the conditions are a huge part of what makes this major championship so special imo.