[puffoflogic]

The claim seems dubious in Europe, but in North America the stove has access to twice the voltage potential as the kettle, so can heat faster. Then with equal losses the stove wins.

[im-a-baby]

Europeans use 220V for everything.

[eru]

Well, Germans like to use three-phase power for their electric ovens.

(Still nominally at 230 Volt, but it's not quite the same as two-phase power.)

[puffoflogic]

So in Europe the phenomenon of a stove heating faster than a kettle would not be observed. Isn't that what I said?

[serpix]

230V/3kW induction stove boils a cup of water faster than you can get the cup from the cupboard.