Yeah, but if you post every two or three days that means that you have three new chapters in a week. And let's say that your readers all have school/work/other activities that keeps them busy during the week. They'll fall behind trying to read all your chapters. It's much easier to post once a week, making sure that the majority of your readers will have a week to read and review.
Besides, I know many writers who take months to write a chapter. xD Their stories do get pushed down, buried under the new threads, but their readers come back for more. It's worth the wait. Your chapters will have a good quality to them because you can take the time to edit them and possibly improve them based on the reviews of your readers.
*cough* Ranger O'Brien, I'm waiting for your chapter. >0
