Ive used both methods Jim, and can tell you that diapause is unreliable and often creates weak babies and hatching rates as low as 10%. This is not every time, but many times. Your best bet is constant 68-70F. It's reliable and works. Don't ask me why the older literature makes it seem like diapause is necessary. That advice wasted a lot of time and eggs for me when I first started working with them.
Kevin