LBlack14
IIRC think that was under dry conditions and good lie.
He was just repeating the research by Cochrane and Stubbs who published research on the results of using grooveless clubs
This probably explains it better than I could
"The more loft the greater the backspin. The grooves have no influence on the launch angle or backspin on the ball. Well known club designer Ralph Maltby built a set of irons with no face groves at all and played with them extensively to prove this point to disbelievers.
In the mid 1980's the USGA undertook extensive groove type testing and concluded that in dry conditions it was loft, not grooves that put backspin on the ball.
So what is the function of the club's grooves? They are like the treads of car tires. Tires with no treads would work perfectly well on dry roads. However, we need them to work in the wet as well. The treads channel away water so that the rubber of the tire stays in contact with the road. The treads prevent "hydroplaning."
Clubfaces without grooves work fine in dry conditions but with water and grass in the way, the grooves allow some of the trapped materials to be moved from the collision zone. Without grooves you may get a high flyer with less spin and in this instance the ball does in fact run up the face - it actually skids up the face on the lubricating water and/or grass."
