Gerry Dulac of the Pittsburgh Post-Gazette caught up with Tom Olsavsky, TaylorMade's senior director of product creation who said
"We're advertising 17 yards because legally that's all we're allowed to advertise, but most times when we've done 1-on-1 [testing], it's been 20 to 26 yards. When we tested it during our demo day in Orlando [at the PGA Merchandise Show], the average was 28.6 yards longer. We've never had a jump like that. Never."
The real difference with the RBZ fairways is the COR, or coefficient of restitution, or trampoline effect of the ball off the clubface. The legal limit is 0.830 but fairway woods by design usually only get to approx 0.780. Until the RBZ fairway which clocks in at 0.810. That helps the ball come off the face faster with less backspin. It all means more distance!