That is interesting, but if the tree does not grow then it will be difficult to style. I am happy to get my trees growing as quickly as possible by adding fertiliser to encourage growth so that it can be styled. Certainly a quicker growing species will be easier to style. For example the Oaks are slow growing and are going to take much longer to style than a Maple, or Larch. I like all of these, and do have them, it still requires the same amount of patience though. I am passionate about all the species I have.
And of course, the older the tree the slower it will be growing.