"Old school" no. "Experienced" very often yes. Having exposure to the "old school" and the "new school" and the "private school" or whatever will certainly add to your flexibility, but there's no "school" that is inherently superior given a general level of complexity, because players may not care for the feel of the stuff you learn from any particular school.
Having exposure to multiple editions can be a huge boon simply because a lot of fluff never gets reprinted. Anyone who made a dent in the 2E catalog has more lore in their heads than they'll ever be able to use, but you can expose a "new school" gamer to that same information, without the rules, and they'll still be able to use it.
If there is any real advantage to any one style of play, it's going to be group-specific. As a form of entertainment, gaming is good or bad largely based on its ability to engage its audience, and audiences can have a variety of tastes and tolerances, and any one audience is going to be too small for statistics of what people like to play a part.