Since I'm not trying to make a living off my comic, and it's literally my source of stress relief, I take my time with the visuals. This means I update whenever, but I do try to update about once a week if possible. Whether I'm good at executing it or not, my comic sort of relies on visual detail. Things like body language, expressions, environments, material items have a certain importance when it comes to my characters and/or story. I can't really skimp too much without losing some of the subtlety I'm trying to portray, and honestly I don't really want to. Details, while sometimes a little to extensive, are really fun to do and I try to make my comic creating experience as enjoyable as possible.
TL:DR: I personally prefer taking my time to create detailed pages rather than go for simplicity to pump out as many pages as possible.
You know, I hardly ever notice this unless I'm already following a comic that I see through to the end. I also don't care about short vs. long unless the long comic is like, 40 chapters in, with 50+ pages in each chapters. At that point it feels like the author should probably start wrapping things up, at least imo.