I'm a 3.5 guy. In my experience, S&V at this level isn't completely unheard of, but it also isn't particularly common. Most guys 3.5 doubs matches that I've been involved in don't have a lot of S&V, and for sure not consistent, every point S&V.
Haven't played as much singles as doubles, but have also never come across a true S&Ver in singles.
Personally I've been trying to work some S&V into my (doubles) game more frequently over the past several months, with mixed results. It's great when it works, doesn't always work for me yet.