From an accuracy perspective, recurves have several advantages. For a given weight, they are usually a little more efficient, ie., they will shoot a little flatter, faster. Their draw is generally a little smoother, which over a lot of arrows in tournament shooting may be a factor. Their risers are generally larger/heavier, making them more stable. Generally, their sight windows are cut to or past center, making tuning easier and enabling them to accept a wide range of arrows, for example, physically light but high spined arrows. All of these are advantages over "traditional" longbows. Three-piece takedown longbows and other hybrids are clouding those differences. There are also some inherent advantages of carbon and aluminum shafting over wood. Carbon and aluminum are generally straighter and lighter, which makes for more accuracy in target archery. When you take an average cross section of shooters, they will generally shoot a little higher scores with recurves than with longbows, though on any given day, the top longbow shooter may beat the top recurve shooter. Likewise, those shooting carbons are generally going to shoot higher scores than those shooting woodies. What's is happening and has happened in traditional 3-D tournaments is that they've just become more competitive, and the myriad categories springing up is a partial reflection of the differences between the equipment. I like the way they do it at Comptons. Shoot what you want. Nobody keeps score.