Personally, I don't know how good he is, but I do know he's got 100+ hours on his PPL, so - annoyingly - it looks like the answer is yes.
Besides, whilst I do agree that aceing the exams is no good if you can't pass the flying tests, you can only jump the hurdles placed in front of you at any given time.....all we can say so far is that he has a perfect training record, the rest remains to be seen, but it does seem a bit harsh to be questioning his flying capability just now, purely because he's got great results. The same ("can he fly") could be said about any other cadet, could it not.......