Hello/Peace,
Thank you for asking the question in this post. I think this is important to clear out and I think you probably received a lot of answers all ready.
One thing is definately clear: The Holy Qur'an nowhere mentions Aisha's age. In fact, Aisha is not even mentined by name (nor any of the Prophet's pbuh wives). Also, The Noble Qur'an states that a person should marry engage in marriage/consumate a marriage when they are able to make clear decisions in terms of finances and other family matters. Obviously, a child of 6 and 9 is unable to do so. Many called Prophet Muhammad savs a 'Walking Qur'an'. This tells me that he followed the Qur'an. Also, very important, Qur'an commands Muslims not to talk about their sexual details with their friends/strangers. So, Muhammad pbuh being the Walking Qur'an, why would he talk about having a sex with a child? Or Aisha, his beloved wife, as a good Muslim, why would she talk about that?
Another important thing to remember is that the Hadiths (even though many would kill me for saying this, but I am going to say it anyway) were collected many many years after Prophet pbuh death. During his life time, holy Prophet pbuh forbade his friends/followers from writing down anything but the Holy Qur'an as It was revealed. This should tell us a lot.
What was acceptable in the past, may not be acceptable today. But even today, what is acceptable in some cultures, is not in others. Maturity for marriage was based on various things, some of which is the menstrual cycle. In certain areas of the world, women do go into puberty earlier. Now days, we can find many examples where children as young as 7 yrs old engage in sexual behaviors (even sexual intercourse) without their parents' knowledge.
Prophet Muhammad pbuh was married to Khadijah for 20 years and only after her death did he marry other women, including Aisha ra. So, if a person has that many wives, why would he urgently want to have sex with a child of 9? Also, if Prophet pbuh was "such a pervert," why would he attract anger and hostility from the pagans who killed female children, sexually enslaved them and burried them alive? A pedophile would, I believe, go along with such evil practices because after all the pedophiles only want sexual gratification.