To befair bhewas 'amsing', but veryover-rated.
His disability is of no interest to me as I only judge on entertainment value.
The real test of any comedian is perhaps to listen to them, rather than watch them. If he was on sound only without the aid, subliminal or otherwise, of his condition then he would not have been particularly amusing.
That said however, if he really did get tweeted by Frankie Boyle, then perhaps Boyle could learn a lot about wholesome entertainment from a young pleasant and well-intentioned performer.