The pundit has been discussing the Spurs and Three Lions striker.
The former Arsenal defender was analysing the striker's performance for England against Italy on Tuesday night.
And, generally full of praise for the Tottenham and England man, Keown said: "The Italians didn’t give him much space but he was very clever looking for Rooney. It was refreshing to see the two developing something of an old-fashioned partnership.
"They intelligently looked for each other, and the link play was good - that’s not something you see when Rooney plays with Welbeck or Sturridge. Kane is technically good and links so well so in a way I’m struggling to work out why it’s taken him this long to reach this level!"
There's certainly a tongue-in-cheek tone from Keown, who - as stated - was full of praise for the 21-year-old.
But the pundit's last statement is definitely an interesting discussion point, if not veiled criticism. Is Kane simply a late bloomer like Ryan Mason or was there something wrong with his coaching?
While Tim Sherwood tries to take all the credit for the forward's success, should he have trained him better? Should Mauricio Pochettino have started him regularly from August not November? Should England's Under-21 coaches have told Roy Hodgson about his abilities much sooner?
It matters little now, with the Tottenham man firing from all cylinders. But, while the likes of Raheem Sterling and Adnan Januzaj were idolised what looks like far too soon, Kane's rise to prominence was unusually slow and steady.