Well specifically its great against Woolwich, and a good few vs Liverpool, but not great vs the rest. Dele Alli is still tied with Kane on 5 league goals vs Chelsea. Only has 5 vs City and United also, so whilst not a bad record, still less than a 1 in 2 strike rate against 3 of the other big 6 teams.
There is also plenty of evidence of him vanishing in high pressure games, he was shite at Milan recently, anonymous at home vs Woolwich, CL final comes to mind, Euro final he had a stinker, big 6 away games he rarely turns up except maybe at Woolwich. I love Kane and he's a club legend but as much as people say he deserves trophies he has also been a factor in us not clearing the final hurdle imo.