I actually don't think that Kane first touch is something sublime, but it's pretty good. Lukaku's first touch gets a little overblown imo, but it's also true that it's sometimes pretty erratic. Not just that you need to pull footage to prove others, but only when looking at him playing and he pulls off a great first touch by controlling some very hard ball down it will leave you a little bit surprised. Good thing is that there are signs of progress this season.
Where I do think he is great, other than when he has lots of space to operate, is when he does quick one-two with the player next to him, either by putting the player through or opening the space for himself.
Hit high balls at him or just leave him in a no man's land like we sometimes do without much support and he will have trouble to keep it. Well, it's no wonder, as even Kane and Lewandowski would experience difficulties in such setup.