It was mentioned, here, there and everywhere. He is not. If you read the linked thread, or even looked at the pictures, he is Astrotrain sized.
Awesome dino mode. That's good as mine will be displayed in his preferred form so his different from G1 robo mode doesn't bother me!
I'm a bit put off by his size (along with Astrotrain mind you). Having a Grimlock who isn't much bigger than Bumblebee just doesn't sit well with me. The sculpt looks nice, but he's just too small.