He's a Big Girl (I mean Boy)

Matty's favourite line lately is "I'm a big girl."
Okay, he's a boy. we know. He doens't quite get that, but whatever. The point is, he is ready to be a big kid, he's growing up.
On Friday our daycare administrator approached me. She told me that she think Matthew is ready for "toilet learning". I knew this day was coming. I know parents anticipate it for years, or at least months. But, I honestly admitted to her that I'm not ready. I'm not.
I have no interest in discussing potties, cleaning up accidents, etc. etc. But, he is ready. And so I will suck it up an start training him. All the signs are there. He wakes up with a dry diaper. He tells us when he needs a change and he is obsessed with the potty. The morning he told me he needed the potty, pulled off his diaper, sat down and peed.
Okay - it was impressive.
I'm beginning to think he may train himself.
According to the daycare admin, there has only ever been one boy go to the preschool class toilet trained. I think Matt is scheduled to move up in October. Is this a challenge???
My friend's daughter pretty much trained herself. Salina had been trying for weeks, and then one day her daughter refused to put on diapers, would only wear underwear, and wanted to use the potty. Okay, it was pretty funny because she decided to do this on a day when Salina, Ginny and I were going to a playgroup, and when this little girl makes up her mind, it's made up. But the point is when she was ready she was ready. As is Matt apparently.
And this morning he told me he wants Diego underwear (we only have Bob the Builder). Ummm .... okay. I shall buy those (does this come out of clothing budget or out of our grocery budget where the diapers come out of - see questions I am unprepared to answer).
But, there have been other signs of him growing up.
First of all, his speech has changed so much. He talks in complete sentences and thoughts. It's pretty amazing. For instance he says "Matty hurt his knee yesterday. I'm okay now" Wow.
I love this speech development. I have always talked to him constantly. (shocker) and finally he responds constantly. Sometimes it's almost a contest to see who can talk first.
He is also really quick witted. Like, yesterday he kept doing the same thing over and over. Frustrated, I turned to him and said "Matthew I already said no." And he said "Mommy, I already said yes".
What???
Kids - they're amazing.