Why, yes. Yes it is. On the webmag "Escape Into Life" is a piece about 6MinuteStory, a writing prompt website. It's all about how this kind of fast-paced writing system makes for prose that is tight, focused, riveting. The article includes two sample pieces from 6MinuteStory that are good examples of this.
The first, a gripping and disturbing little bit of creepy mayhem, is "Bury My Heart At Wounded Thigh", by Tony Noland.
I wrote this in six mutues, based on a prompt from the website software. Everything, from plot to spellcheck, has to happen in those six minutes. It is as extemporaneous a piece of fiction as can be done. I'm pleased it came out well enough to make the front page.
Follow me on Twitter: @TonyNoland