Jean
I think that method works better for soft wood cuttings rather than vegetative -as for pelargoniums I seem to recall the advice is that they root better if the cut has dried off for a few hours-so leaving them in water won't help that and also I feel if there is no sign of root now the next thing is they will just go soft and mushy
I would try rooting them now in the usual way-but it may be too late