Pee for Delivery?

Last night, just before bed, I opened up Kyle's book called "What to Expect While Your Wife is Expanding". I read the labor and delivery chapter and saw that the author mentioned urinating as a sign of impending delivery. He said that if a woman pees every hour, she is still not due for about four weeks. If the urination is more frequent, like every half hour, the baby will arrive in about two weeks. The author joked that if the wife asks if she can just stay in bed and pee, it would be best to head to the hospital. I wonder if this is true? I had never heard that tidbit before.

I'm going to start drinking so much water my stomach will want to burst. I can make myself pee every half hour if I want to.. But that probably doesn't count, does it?