Why Don't Evening People Get More Credit?

Now, of course, the real niggle about morning people is that they are also the type of people who get stuff done. I'd like to think this is a coincidence, but possibly it's not. I suppose I am, by default if nothing else, an evening person, but evenings are a rubbish time to do anything constructive. There's too much good telly on, for one thing, and you're allowed to drink alcohol without people thinking you've got a problem.