Exactly Mark! In my experience you can certainly write around 1000 words per hour, even if you are practically new to blogging. I personally think that spinning articles is just a gimmick that doesn’t really get results but wastes tons of time. The spinning software certainly makes a lot of money for the creators though! They are the ones who are laughing all the way to the bank!
I've ranked websites in the past with spun content, and now they are still on #1 position of google. First year (2014) google found me because my spun was really bad, many paragraphs were just copied and my position drop from #2 to around #20 after a panda update. Later I cleaned all my text with better spun (I didn't buy any article!), my ranking went up again, and with more backlinks I reached #1 and it is still there