There's a lot of people who like to binge read large amounts of pages in one sitting. I noticed that especially with my comic that has 70+ pages, some take a whole day, some just less than an hour to get through it, but they do in one go. I also saw in some forum posts before, that if a comic updates daily (or a couple pages a week), they will wait for the pages to pile up, before reading them at once.
So I think you're pretty fine with uploading everything in a short amount of time. And I think people won't try to pressure you to upload new pages faster, especially when the chapter stops right before/or in the middle of something interesting.
To answer your questions, as for me, when I get interested in a comic, it's always great to see if there are a lot of pages to go through. If I get tired reading, I'll always come back the next day to continue where I left.
I will only avoid a comic when it has a lot of pages - but the story isn't going anywhere, or it's so confusing that I'll get lost somewhere and have to re-read it again from the start. Then I'll pretty much drop it.