Whoa - 12:14 am on Mar 23, 2011 (gmt 0)
Just to clarify, the paper I mentioned above is the same one Tedster alluded to (I hadn't seen his post). If you actually read it, it says spelling/grammar/typos and quality are not well correlated. In other words, many high-quality pages, as judged by humans, have errors. Still, I agree that it's wise to fix any and all errors.