Update~ A number have people have commented on her blog asking her to post a link to where she is getting that stat and she hasn't posted anything yet. I'm guessing there aren't any to back that up because if there where I would be touting it all the time!
Here is what one poster said:
While it's true that both carry a risk of less than 1%, from what I have found, they are not "the same risk". This link discusses multiple studies and says, "the modern rate of unscarred uterine rupture during pregnancy is 0.012% (1 of 8,434)", and a few pages later in the article, it says that the rate of UR in a spontaneous TOLAC is 0.45% -- still less than 1%, but 40x the risk of rupture in an unscarred uterus.
I just think it's really important to clear up things like this. I find people at work all the time beleiving whatever they read on the internet. Without checking their sources, etc and it leads parents to making very bad decisions.