Roel, you don't seem to get it. There are many songs that DO NOT use vibrato on every note that those instruments hit. In fact many of them sound awful with it on when it's not supposed to be.
Give me a call and I'll show you exactly what I mean.
416-469-3465
Do any of you sequence your own midi files by listening to the songs by ear and laying them down track by track? If you do, you MUST have noticed that with the vibrato always on certain instruments that it was IMPOSSIBLE to match them to exactly what the song was originally.