It depends on your situation. For example, I just switched jobs and I was fine with simply receiving the standard 10-15% pay increase that most recruiters know

It depends on your situation. For example, I just switched jobs and I was fine with simply receiving the standard 10-15% pay increase that most recruiters know they have to offer to get you to move, so I simply told them my current salary. If I was looking to make a huge jump then I wouldn't have done that, but I really liked the company and was excited about the work. It's all about what the move represents.