This is an old conceptual problem which come from the begining of our careers.When you are at the flying school , since the GA airplanes have no RA , you are teached to check the V/S.Then you go to the medium jets and you continue using the V/S isntintively for all your life until the question arises.
In the medium jets , this is not a big deal since they are still short, but you can already note some erros ,despite V/S information is beeing provided by IRS.
When you go to the large jets, since the moment that you start rotating until the point you get your wheels flying take some time. It hapened to me srveral times , to hear from inexperienced pilots "posite climb" with the MLG still on the runway.
I take a look at the V/S , but the reference I really consider is RA.