This is a super hard question! I'd love to post more, but as I'm having a full-time dayjob, a partner, cats and other stuff that keeps me busy/sane, I stick to my one page/week schedule to have very few breaks/hitauses. I think readers either batch-read after I've posted a few pages, or they just trudge along with one page/week.
I think I as a reader kinda like few and short updates/week - I sadly have very little time to catch up on web comics, so ideally 1-2 pages/week is great for me as a reader (but if you want to post longer than that, sure thing, I'll read it if I like the comic) =)