David has always been very careful with his words on Twitter but that never stopped him from being sweet with Gillian, even in the most friendly way. That thank you was way too cold to be from him directly. If it was him, he would have found a poetic deadpan quote from a well known author to write. And this goes for thanking Gillian and for every single tweets that are made supposedly by him lately. His twitter account just doesn’t sound like him at all.