Golf is a walking game. Unless the golf course has ridiculous distances between the green and next tee box, a walking group should always speed up play. I’ll add one caveat; if a foursome knows how to play in carts, they can at times play as quickly or a bit faster. However so few people know how to play in carts. Walking gives a player the time to consider their next shot before getting to the ball and it’s also better for their health.