My co-author and I have decided to take the plunge and begin posting our work of fantasy fiction online as a serial novel. We've already written the first 39 chapters, so for awhile anyway, the availability of content and the speed at which we write won't be an issue. Our chapters range from 1500 to 6000 words each.
The question is this: In your experience what works better - 3 times weekly updates of about 1000 words, or weekly updates by chapter? Do readers seem to have a preference?