I respectfully agree -- in general. Once the student has mastered the basics of flying & ground handling with a trike, the transition to a dragger is generally easier that struggling with one right off the bat. He/she is no longer all wound up about the mechanics of flight -- just scared stiff about the take-off.

However, the trouble with generalities is that they are generalities -- with a gazillion exceptions. There are 'draggers from hell & 'draggers that are a piece of cake.

Generally converted trainers aren't a huge problem -- the large tail moment helps to tame them, so the transition from a Superstar trike to a Superstar 'dragger is pretty simple.

Other planes, like warbirds for example, are an entirely different matter & the transition from a Superstar trike to a Spitfire is quite hellacious, without regard to actually flying the Spit.

Similarly, there is a gigantic variation in natural tallent & reflexive response on the part of the pilots -- some hardly notice the 'dragger problems & some never get over them.

All things considered, I generally prefer students to take their lumps first with a trike -- not that trikes are faultless.