Are synthetic bowling lanes all plastic or is there wood too?

Synthetic Bowling lanes are made of compressed paper with a "lane" look inlay over the top that is then sealed. This provides a more consistent shot than traditional "wood" lanes. However a lot of traditionalist bowlers feel that bowling on "wood" lanes is the true showmanship of a bowler. The ability to change with the conditions, since each lane can very greatly from one to the other.