I saw some screencaps of her melt down and I think the pain she felt from having to do the blog is real.It does look like the writing of someone who does have a mild learning disability when it comes to writing, to me.
That she knows that she can't do it (and her word choice problems while speaking) in my arm chair diagnosis office indicate that the IQ is probably a fair amount higher than the language ability might otherwise indicate. How much is a learning disability vs really bad schooling I don't know, but I'd bet she is one of those who is bright enough that they get OK grades and may not get the extra help they need to really succeed at writing/language skills.
I really do feel for her over this. Usually if you are bright enough to know you really suck at something you have figured out how to make sure people don't know about it, and in this case she couldn't hide it. That tends to be very painful.