In almost any sport, having a strategy that is counter to the dominant strategy is a big bonus. Today's generation of baseliners may do well against S&V, because while they were growing up, S&V tennis was still present and taught. So perhaps S&V won't be as effective in today's tennis. But think about 5 years from now. If the kids of that generation are only taught one way to play and that is baseline tennis, then they will have very limited opportunities to develop counter strategies to a S&V player. So if a talented S&Ver were to come along (ala Pete Sampras like), they should do very well, even with the slowed surfaces.