Just a case-in-point to disprove the concept that the writing is different in ebooks,
I started writing my novel Hatchings, which I self epublished on Amazon and Smashwords last year, in 2007. I wrote the first draft in 35 writing days. That books spent the next 5 years in revision and the submission process. I know that the entire book went through at least 7 revisions. It went through at least 3 different reviews and edits. I polished the daylights out of that book (and yes, you can still find mistakes in it). Does that count as a faster or less rigorous writing process?
I have 3 other novels in the process of being written. One of them has been in the process for almost 10 years. Each of them is slated to be an ebook when they're finished to my satisfaction and after they've been edited by outside parties and then revised.
Each of my dozen or so short stories I epublished last year was written, put into SYW for review and critique, revised, sometimes very heavily, and only when I was happy with them did I epublish them. As they are short stories they are shorter, yes. But every single story goes through a process of write/spell check/revise/grammar check/ revise/post in SYW/revise/ review/edit/publish, a process that can literally take weeks. Some of those stories I've even submitted to professional publications.
I believe your opinion of the epublisher and self-publisher's (and I view them in remarkably similar manners since we used to, in 1982, call this desktop publishing, and that's how long I've been in this game) is shortsighted and based on remarkably incorrect assumptions. It may be that you are basing your assumptions on the mountain of slush or poorly written erotica that is available on Amazon and Smashwords or over at PubIt! It may be that your assumptions are based on the mountain of get-rich-quick-writing schemes available via the Interwebz (I get the ads too).
Good writers, whther they self-publish or commercially publish take the time and effort and make the sacrifices necessary to make sure their work is the best it can be. Not all of us are great writers, but we generally try to respect one another and the time it has taken us to get where we are today.
I take a great deal of time writing my stuff and revising it, spell checking it, editing it, reviewing the critiques, etc., etc., before I self-publish to Amazon, Smashwords, and PubIt!. I know most of the other writers here at AW do as well.