My first hevruta (study partner) tried out four different yeshivot before finding the right one. In each case, the learning approach of the rosh yeshiva was the determinative factor. The learning approach that most suited my hevruta was a very deliberative and careful working through the gemara, not moving on until the material had been thoroughly grasped.
It was no accident that he and I learned together the same way. We didn't cover a lot of ground, but the ground we covered was really covered.
I wonder what would have happened to my hevruta if he had never found that rosh yeshiva? More relevant for us now, what about Messianic Jews who wish to learn seriously in a traditional setting or privately from a rabbi? How do MJs find a rabbi whose approach to learning is compatible with theirs?