I always see threads that criticize Red Velvet for only being a TOP 3 girl group. Seriously? Yeah, I get it, they're from SM. But here's the thing people have to realize, Red Velvet, by all accounts, has exceeded SM's expectations. How so? Red Velvet was never meant to be SM's flagship girl group. They just happen to be SM's only consistently active girl group at the moment with SNSD taking a long hiatus, and F(x) being in limbo. Red Velvet will never do the songs and concepts that you basically see in main groups do. It's clear that SM looks at Red Velvet as their experimental girl group, like they did with F(x). That's the reason Red Velvet does the more eccentric concepts and genres that you wouldn't see SNSD do. So the fact that Red Velvet, pretty much SM's sub project, is doing as well as they are is amazing. Basically, Red Velvet was not SM's attempt at competing with the flagship girl groups from other agencies. Red Velvet just happened to do better than they imagined they would. I think that SM will probably debut their new girl group in the near future, but they also feel no rush considering how well Red Velvet is doing.