True - I can think of comics that I've read who had their first chapter as a full update, and I'd been really agitated with having to read it all at once XD But in those cases (I can think of 2) the chapters in question were pretty long, with a lot of text, too.
My first chapters only have 12-17 pages, so I don't really think that would be a problem for me, plus, if I was worried about it, I could separate it into a part 1 and part 2, and it would still be less 'episodes' than it is currently.
It is true that that's something that really depends on the comic - some are really heavy and have long chapters, so they wouldn't do very well condensed into one update, and some have short chapters and dialogue that can be flown through in one swoop.