That's true. But what's also true is women tend to want to settle down in their early-mid 30s (at least in large American cities, among professional types) and

That's true. But what's also true is women tend to want to settle down in their early-mid 30s (at least in large American cities, among professional types) and now they become simultaneously more selective. In a sense, women are always the 'choosers' with rare exceptions. Men tend to have wider nets, on average.