I would defer back to Francois....sort of means what you mean by "better".
I can appreciate all the votes for a tail wheel configuration as a better learning platform, but I suspect the numbers simply don't support that idea.
Tricycle configurations prevail due to several important considerations that go beyond simply learning to operate an airplane.
Overall they are safer, which means less cost for insurance.
They are indeed easier platforms to learn on (And yes, I do agree with the stipulation that if you learn on a taildragger first, you will find transition to a tricycle arrangement easier -- but then again, if you kill yourself first you won't have to worry about transition).
There are more made, which tends makes them less expensive to purchase, and means that most pilots are trained on the platform they will actually operate.
Being the most prevalent platform also means they are generally cheaper to operate as parts and trained technicians are in greater supply. Not to say that any given taildragger will be less expensive, just that at the macro level that will not be the case.
Having said all that, if any pilot wants to go do initial training in a tailwheeled aircraft, I would encourage him to so. The important thing is doing the training and getting the license...period.
I myself am working on getting signed off on tailwheel certification...that's why I've become aware of some of the costs as I deal with my insurance company.