I recently read regarding Doral, which underwent a renovation of most greens, that such greens are usually (always?) very fast. So if this is true, (new green = fast green) i wonder why true. The only notion i can offer is that the grass, (sod?) has an immature root bed thus the surface of the green is closer to the underlying sand. This may make the grass less dense and harder, thus faster. Or maybe the immediate layer beneath the turf is denser due to fewer roots.
But something must be making the surface 'harder' or 'firmer' to help create more ball speed over the surface.
Any ideas on this topic from greenkeepers?